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test/diagrams/graph_hard/diagrams_103.dot

@@ -0,0 +1,60 @@
+digraph {
+	rankdir=BT
+	N0 [label="Order Status Check" color="#3F51B5" fillcolor="#C5CAE9" shape=document style=filled]
+	N1 [label="Issue Escalation" color="#3F51B5" fillcolor="#C5CAE9" shape=document style=filled]
+	N2 [label="Inquiry Handling" color="#AB47BC" fillcolor="#F3E5F5" shape=inputoutput style=filled]
+	N3 [label="Knowledge Base Creation" color="#AB47BC" fillcolor="#F3E5F5" shape=hexagon style=filled]
+	N4 [label="Account Management" color="#03A9F4" fillcolor="#B3E5FC" shape=ellipse style=filled]
+	N5 [label="Customer Journey Mapping" color="#AB47BC" fillcolor="#F3E5F5" shape=document style=filled]
+	N6 [label="Service Blueprinting" color="#AB47BC" fillcolor="#F3E5F5" shape=vnode_shape style=filled]
+	N7 [label="FAQ Management" color="#03A9F4" fillcolor="#B3E5FC" shape=preparation style=filled]
+	N8 [label="Customer Satisfaction Survey" color="#3F51B5" fillcolor="#C5CAE9" shape=multipledocuments style=filled]
+	N9 [label="Customer Onboarding Support" color="#03A9F4" fillcolor="#B3E5FC" shape=diamond style=filled]
+	S1 [label="" color="#03A9F4" fillcolor="#B3E5FC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#3F51B5" fillcolor="#C5CAE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Refund Processing {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Refund Processing"
+		nest0_0 [label="Email Support" color="#AB47BC" fillcolor="#F3E5F5" shape=predefinedprocess style=filled]
+		nest0_1 [label="Up_selling Opportunities" color="#AB47BC" fillcolor="#F3E5F5" shape=preparation style=filled]
+		nest0_2 [label="Sentiment Analysis" color="#3F51B5" fillcolor="#C5CAE9" shape=diamond style=filled]
+		nest0_3 [label="Self_Service Portal Management" color="#03A9F4" fillcolor="#B3E5FC" shape=hexagon style=filled]
+	}
+	subgraph cluster_Training Customer Service Agents {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Training Customer Service Agents"
+		nest1_0 [label="First Contact Resolution Optimization" color="#AB47BC" fillcolor="#F3E5F5" shape=preparation style=filled]
+		nest1_1 [label="Customer Success Management" color="#AB47BC" fillcolor="#F3E5F5" shape=hexagon style=filled]
+		nest1_2 [label="Product Information Provision" color="#3F51B5" fillcolor="#C5CAE9" shape=rectangle style=filled]
+	}
+	N0 -> N1 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#03A9F4" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#03A9F4" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#03A9F4" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#03A9F4" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#03A9F4" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest0_0 [color="#3F51B5" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#03A9F4" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	N8 -> nest1_0 [color="#03A9F4" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N3 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N4 -> S1 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N9 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#AB47BC" penwidth=1.5 style=solid label="records" dir=forward]
+	S1 -> N7 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#03A9F4" penwidth=1.5 style=solid dir=forward]
+	M0 -> N5 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N6 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_109.dot

@@ -0,0 +1,76 @@
+digraph {
+	rankdir=BT
+	N0 [label="Reclamation" color="#FFCC80" fillcolor="#FFF0CC" shape=vnode_shape style=filled]
+	N1 [label="Mine Planning" color="#BDBDBD" fillcolor="#F5F5F5" shape=preparation style=filled]
+	N2 [label="Environmental Impact Assessment" color="#FFCC80" fillcolor="#FFF0CC" shape=rectangle style=filled]
+	N3 [label="Exploration" color="#FFCC80" fillcolor="#FFF0CC" shape=rect style=filled]
+	N4 [label="Mine Closure Planning" color="#FFCC80" fillcolor="#FFF0CC" shape=predefinedprocess style=filled]
+	N5 [label="Feasibility Study" color="#FFCC80" fillcolor="#FFF0CC" shape=inputoutput style=filled]
+	N6 [label="Resource Estimation" color="#BDBDBD" fillcolor="#F5F5F5" shape=predefinedprocess style=filled]
+	N7 [label="Community Relations" color="#D3EB9F" fillcolor="#F8FDD3" shape=hexagon style=filled]
+	N8 [label="Ventilation System" color="#D3EB9F" fillcolor="#F8FDD3" shape=database style=filled]
+	N9 [label="Tailings Management" color="#FFCC80" fillcolor="#FFF0CC" shape=ellipse style=filled]
+	N10 [label="Safety Management" color="#D3EB9F" fillcolor="#F8FDD3" shape=rectangle style=filled]
+	N11 [label="Regulatory Compliance Reporting" color="#D3EB9F" fillcolor="#F8FDD3" shape=rect style=filled]
+	N12 [label="Mineral Processing" color="#D3EB9F" fillcolor="#F8FDD3" shape=rectangle style=filled]
+	N13 [label="Ore Extraction" color="#FFCC80" fillcolor="#FFF0CC" shape=rectangle style=filled]
+	N14 [label="Geotechnical Stability Analysis" color="#D3EB9F" fillcolor="#F8FDD3" shape=rect style=filled]
+	N15 [label="Open Pit Mining Operations" color="#D3EB9F" fillcolor="#F8FDD3" shape=ellipse style=filled]
+	S0 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#D3EB9F" fillcolor="#F8FDD3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Geological Survey {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Geological Survey"
+		nest0_0 [label="Noise Management" color="#BDBDBD" fillcolor="#F5F5F5" shape=hexagon style=filled]
+		nest0_1 [label="Ore Sorting" color="#D3EB9F" fillcolor="#F8FDD3" shape=box style=filled]
+	}
+	subgraph cluster_Waste Rock Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Waste Rock Management"
+		nest1_0 [label="Exploration Drilling" color="#BDBDBD" fillcolor="#F5F5F5" shape=ellipse style=filled]
+		nest1_1 [label="Permit Acquisition" color="#FFCC80" fillcolor="#FFF0CC" shape=database style=filled]
+	}
+	N0 -> N1 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed label="separates" dir=forward]
+	N7 -> nest0_0 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N14 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> S0 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	S0 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N15 [color="#000000" penwidth=1.5 style=dashed label="complies" dir=forward]
+	N2 -> S1 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	S1 -> N7 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#000000" penwidth=1.5 style=dashed label="develops" dir=forward]
+	S1 -> N13 [color="#D3EB9F" penwidth=1.5 style=dashed label="drills" dir=forward]
+	N12 -> M0 [color="#000000" penwidth=1.5 style=dashed label="plans" dir=forward]
+	N13 -> M0 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N11 -> M0 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	M0 -> N15 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N12 -> M1 [color="#FFCC80" penwidth=1.5 style=dashed label="extracts" dir=forward]
+	N5 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#BDBDBD" penwidth=1.5 style=dashed label="maintains" dir=forward]
+	M1 -> N14 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_110.txt

@@ -0,0 +1,35 @@
+<Asset Management, connectedTo, Crushing and Grinding>
+<Asset Management, connectedTo, Noise Management>
+<Crushing and Grinding, connectedTo, Feasibility Study>
+<Drilling and Blasting, connectedTo, Mine Closure Planning>
+<Environmental Impact Assessment, connectedTo, Drilling and Blasting>
+<Equipment Maintenance, connectedTo, Haulage>
+<Equipment Maintenance, connectedTo, Resource Estimation>
+<Exploration, connectedTo, Environmental Impact Assessment>
+<Exploration Drilling, safety, Ventilation System>
+<Feasibility Study, connectedTo, Refining>
+<Feasibility Study, connectedTo, Waste Rock Management>
+<Geological Survey, connectedTo, Asset Management>
+<Geological Survey, connectedTo, Crushing and Grinding>
+<Geological Survey, connectedTo, Refining>
+<Geological Survey, connectedTo, Remote Operations Center>
+<Geological Survey, connectedTo, Underground Mining Operations>
+<Haulage, connectedTo, Robotics in Mining>
+<Mine Closure Planning, connectedTo, Waste Rock Management>
+<Noise Management, connectedTo, Crushing and Grinding>
+<Open Pit Mining Operations, connectedTo, Underground Mining Operations>
+<Ore Extraction, connectedTo, Equipment Maintenance>
+<Ore Extraction, connectedTo, Geological Survey>
+<Ore Extraction, connectedTo, Open Pit Mining Operations>
+<Ore Extraction, connectedTo, Refining>
+<Ore Extraction, connectedTo, Remote Operations Center>
+<Ore Extraction, connectedTo, Resource Estimation>
+<Reclamation, connectedTo, Exploration>
+<Reclamation, separates, Equipment Maintenance>
+<Refining, connectedTo, Remote Operations Center>
+<Resource Estimation, connectedTo, Open Pit Mining Operations>
+<Robotics in Mining, connectedTo, Waste Rock Management>
+<Underground Mining Operations, connectedTo, Refining>
+<Ventilation System, connectedTo, Ore Extraction>
+<Waste Rock Management, connectedTo, Reclamation>
+<Waste Rock Management, connectedTo, Refining>

test/diagrams/graph_hard/diagrams_111.dot

@@ -0,0 +1,77 @@
+digraph {
+	rankdir=LR
+	N0 [label="Safety Management" color="#4CAF50" fillcolor="#C8E6C9" shape=vnode_shape style=filled]
+	N1 [label="Exploration" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
+	N2 [label="Mine Planning" color="#DCE775" fillcolor="#FCFCE7" shape=diamond style=filled]
+	N3 [label="Water Management" color="#E57373" fillcolor="#FFEBEE" shape=multipledocuments style=filled]
+	N4 [label="Robotics in Mining" color="#DCE775" fillcolor="#FCFCE7" shape=parallelogram style=filled]
+	N5 [label="Reclamation" color="#DCE775" fillcolor="#FCFCE7" shape=document style=filled]
+	N6 [label="Noise Management" color="#DCE775" fillcolor="#FCFCE7" shape=ellipse style=filled]
+	N7 [label="Refining" color="#E57373" fillcolor="#FFEBEE" shape=ellipse style=filled]
+	N8 [label="Energy Management" color="#4CAF50" fillcolor="#C8E6C9" shape=document style=filled]
+	N9 [label="Autonomous Haulage Systems" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
+	N10 [label="Underground Mining Operations" color="#E57373" fillcolor="#FFEBEE" shape=predefinedprocess style=filled]
+	N11 [label="Emergency Response Planning" color="#4CAF50" fillcolor="#C8E6C9" shape=database style=filled]
+	N12 [label="Open Pit Mining Operations" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+	N13 [label="Equipment Maintenance" color="#DCE775" fillcolor="#FCFCE7" shape=predefinedprocess style=filled]
+	S0 [label="" color="#4CAF50" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#4CAF50" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#DCE775" fillcolor="#FCFCE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#DCE775" fillcolor="#FCFCE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Crushing and Grinding {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Crushing and Grinding"
+		nest0_0 [label="Community Relations" color="#4CAF50" fillcolor="#C8E6C9" shape=predefinedprocess style=filled]
+		nest0_1 [label="Mineral Processing" color="#4CAF50" fillcolor="#C8E6C9" shape=action style=filled]
+	}
+	subgraph cluster_Asset Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Asset Management"
+		nest1_0 [label="Dust Control" color="#DCE775" fillcolor="#FCFCE7" shape=action style=filled]
+		nest1_1 [label="Core Logging" color="#DCE775" fillcolor="#FCFCE7" shape=document style=filled]
+		nest1_2 [label="Tailings Management" color="#E57373" fillcolor="#FFEBEE" shape=ellipse style=filled]
+		nest1_3 [label="Ore Extraction" color="#E57373" fillcolor="#FFEBEE" shape=predefinedprocess style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#DCE775" penwidth=1.5 style=solid label="markets" dir=forward]
+	N5 -> N6 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#DCE775" penwidth=1.5 style=dashed label="extracts" dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N6 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#E57373" penwidth=1.5 style=dashed label="complies" dir=forward]
+	nest1_2 -> nest1_3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest1_0 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	nest1_3 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> S0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N12 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	S0 -> N13 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N3 -> S1 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N10 -> S2 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	S2 -> N13 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N12 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N6 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	M0 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N11 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_123.dot

@@ -0,0 +1,67 @@
+digraph {
+	rankdir=RL
+	N0 [label="Climate Data Archiving" color="#26A69A" fillcolor="#E0F2F1" shape=database style=filled]
+	N1 [label="Public Weather Briefing" color="#BA68C8" fillcolor="#F3E5F5" shape=vnode_shape style=filled]
+	N2 [label="Humidity Sensing" color="#AABEC6" fillcolor="#E0E6E9" shape=vnode_shape style=filled]
+	N3 [label="Flood Prediction" color="#26A69A" fillcolor="#E0F2F1" shape=vnode_shape style=filled]
+	N4 [label="Pollution Dispersion Modeling" color="#BA68C8" fillcolor="#F3E5F5" shape=rect style=filled]
+	N5 [label="Storm Tracking" color="#26A69A" fillcolor="#E0F2F1" shape=action style=filled]
+	N6 [label="Marine Weather Forecast" color="#26A69A" fillcolor="#E0F2F1" shape=preparation style=filled]
+	N7 [label="Air Quality Forecasting" color="#BA68C8" fillcolor="#F3E5F5" shape=box style=filled]
+	N8 [label="Upper Air Chart Analysis" color="#BA68C8" fillcolor="#F3E5F5" shape=rectangle style=filled]
+	N9 [label="Weather Forecasting" color="#BA68C8" fillcolor="#F3E5F5" shape=vnode_shape style=filled]
+	N10 [label="Precipitation Measurement" color="#AABEC6" fillcolor="#E0E6E9" shape=ellipse style=filled]
+	N11 [label="Drought Monitoring" color="#AABEC6" fillcolor="#E0E6E9" shape=multipledocuments style=filled]
+	N12 [label="Cloud Observation" color="#AABEC6" fillcolor="#E0E6E9" shape=ellipse style=filled]
+	N13 [label="Severe Weather Warning" color="#BA68C8" fillcolor="#F3E5F5" shape=database style=filled]
+	M1 [label="" color="#26A69A" fillcolor="#E0F2F1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#AABEC6" fillcolor="#E0E6E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Satellite Meteorology {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Satellite Meteorology"
+		nest0_0 [label="Aviation Weather Briefing" color="#AABEC6" fillcolor="#E0E6E9" shape=predefinedprocess style=filled]
+		nest0_1 [label="Wind Speed and Direction" color="#26A69A" fillcolor="#E0F2F1" shape=document style=filled]
+		nest0_2 [label="Radar Imaging" color="#BA68C8" fillcolor="#F3E5F5" shape=document style=filled]
+	}
+	subgraph cluster_Tornado Watch or Warning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Tornado Watch or Warning"
+		nest1_0 [label="Nowcasting" color="#BA68C8" fillcolor="#F3E5F5" shape=diamond style=filled]
+		nest1_1 [label="Meteorological Instrument Calibration" color="#BA68C8" fillcolor="#F3E5F5" shape=parallelogram style=filled]
+		nest1_2 [label="Snowfall Measurement" color="#26A69A" fillcolor="#E0F2F1" shape=rectangle style=filled]
+	}
+	N0 -> N1 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#AABEC6" penwidth=1.5 style=dashed label="interprets" dir=forward]
+	N5 -> N6 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#AABEC6" penwidth=1.5 style=dashed label="calculates" dir=forward]
+	N12 -> nest0_0 [color="#AABEC6" penwidth=1.5 style=dashed label="warns" dir=forward]
+	nest0_2 -> N6 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N2 -> nest1_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N6 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N6 -> M1 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M1 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	M1 -> N9 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N7 -> M2 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	N6 -> M2 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	M2 -> N9 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	N0 -> N10 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N2 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	N13 -> N11 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N2 -> N10 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_13.txt

@@ -0,0 +1,35 @@
+<Affiliate Marketing, connectedTo, Supplier Onboarding>
+<Cross_selling Recommendation, connectedTo, Customer Review>
+<Cross_selling Recommendation, connectedTo, Gift Card Purchase>
+<Cross_selling Recommendation, connectedTo, Return Merchandise Authorization>
+<Customer Review, connectedTo, Delivery Rescheduling>
+<Customer Review, connectedTo, Order Confirmation>
+<Customer Review, connectedTo, Price Adjustment>
+<Customer Review, notifies, Return Merchandise Authorization>
+<Customer Segmentation, connectedTo, Data Analytics Reporting>
+<Data Analytics Reporting, connectedTo, Cross_selling Recommendation>
+<Data Analytics Reporting, connectedTo, Order Confirmation>
+<Data Analytics Reporting, connectedTo, Return Merchandise Authorization>
+<Data Analytics Reporting, manages, User Account Management>
+<Delivery Rescheduling, connectedTo, Gift Card Purchase>
+<Gift Card Purchase, connectedTo, Order Confirmation>
+<Gift Card Purchase, connectedTo, Return Merchandise Authorization>
+<Invoice Generation, connectedTo, Order Confirmation>
+<Payment, lists, Up_selling Offer>
+<Price Adjustment, connectedTo, Order Confirmation>
+<Promotion Application, connectedTo, Refund Process>
+<Refund Process, connectedTo, Customer Segmentation>
+<Refund Process, connectedTo, Return Merchandise Authorization>
+<Refund Process, connectedTo, Shipment>
+<Return Merchandise Authorization, confirms, Affiliate Marketing>
+<Return Merchandise Authorization, connectedTo, Price Adjustment>
+<Shipment, connectedTo, Customer Segmentation>
+<Shipment, connectedTo, Data Analytics Reporting>
+<Shipment, connectedTo, Gift Card Purchase>
+<Shipment, inquires, Cross_selling Recommendation>
+<Subscription Service, connectedTo, Customer Segmentation>
+<Subscription Service, connectedTo, Return Merchandise Authorization>
+<Subscription Service, returns, Refund Process>
+<Supplier Onboarding, connectedTo, Invoice Generation>
+<Up_selling Offer, connectedTo, Promotion Application>
+<User Account Management, connectedTo, Payment>

test/diagrams/graph_hard/diagrams_130.dot

@@ -0,0 +1,81 @@
+digraph {
+	rankdir=RL
+	N0 [label="New Product Manufacturing" color="#4DB6AC" fillcolor="#E0F2F1" shape=inputoutput style=filled]
+	N1 [label="Contamination Reduction" color="#A1887F" fillcolor="#EFEBE9" shape=rectangle style=filled]
+	N2 [label="Recycling Market Development" color="#A1887F" fillcolor="#EFEBE9" shape=box style=filled]
+	N3 [label="Tyre Recycling" color="#A1887F" fillcolor="#EFEBE9" shape=ellipse style=filled]
+	N4 [label="Composting Organic Waste" color="#F44336" fillcolor="#FFCDD2" shape=rectangle style=filled]
+	N5 [label="Collection Point Management" color="#4DB6AC" fillcolor="#E0F2F1" shape=rect style=filled]
+	N6 [label="Recycling Policy Advocacy" color="#4DB6AC" fillcolor="#E0F2F1" shape=vnode_shape style=filled]
+	N7 [label="Plastic Recycling" color="#4DB6AC" fillcolor="#E0F2F1" shape=predefinedprocess style=filled]
+	N8 [label="Waste Audit for Recycling" color="#F44336" fillcolor="#FFCDD2" shape=parallelogram style=filled]
+	N9 [label="Life Cycle Assessment" color="#4DB6AC" fillcolor="#E0F2F1" shape=database style=filled]
+	N10 [label="Chemical Recycling" color="#F44336" fillcolor="#FFCDD2" shape=rect style=filled]
+	N11 [label="Sorting and Segregation" color="#A1887F" fillcolor="#EFEBE9" shape=rect style=filled]
+	N12 [label="Recycling Facility Optimization" color="#4DB6AC" fillcolor="#E0F2F1" shape=rect style=filled]
+	N13 [label="Commercial Recycling Solutions" color="#4DB6AC" fillcolor="#E0F2F1" shape=parallelogram style=filled]
+	N14 [label="Construction Waste Recycling" color="#F44336" fillcolor="#FFCDD2" shape=preparation style=filled]
+	N15 [label="Mechanical Recycling" color="#4DB6AC" fillcolor="#E0F2F1" shape=rectangle style=filled]
+	N16 [label="Deposit_Return Schemes" color="#4DB6AC" fillcolor="#E0F2F1" shape=document style=filled]
+	N17 [label="Material Purity Testing" color="#F44336" fillcolor="#FFCDD2" shape=predefinedprocess style=filled]
+	S0 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#4DB6AC" fillcolor="#E0F2F1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#F44336" fillcolor="#FFCDD2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#4DB6AC" fillcolor="#E0F2F1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Hazardous Material Recovery {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Hazardous Material Recovery"
+		nest0_0 [label="Product Design for Recyclability" color="#F44336" fillcolor="#FFCDD2" shape=vnode_shape style=filled]
+		nest0_1 [label="Energy Recovery from Non_Recyclables" color="#A1887F" fillcolor="#EFEBE9" shape=preparation style=filled]
+		nest0_2 [label="Electronic Waste Recycling" color="#A1887F" fillcolor="#EFEBE9" shape=ellipse style=filled]
+		nest0_3 [label="Public Recycling Programs" color="#A1887F" fillcolor="#EFEBE9" shape=predefinedprocess style=filled]
+	}
+	subgraph cluster_Recycling Data Tracking {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Recycling Data Tracking"
+		nest1_0 [label="Glass Recycling" color="#A1887F" fillcolor="#EFEBE9" shape=predefinedprocess style=filled]
+		nest1_1 [label="Textile Recycling" color="#F44336" fillcolor="#FFCDD2" shape=box style=filled]
+		nest1_2 [label="Recycling Infrastructure Development" color="#A1887F" fillcolor="#EFEBE9" shape=document style=filled]
+	}
+	N0 -> N1 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#F44336" penwidth=1.5 style=dashed label="cleans" dir=forward]
+	N13 -> N14 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N15 -> N16 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N16 -> N17 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#F44336" penwidth=1.5 style=solid label="tracks" dir=forward]
+	nest0_1 -> nest0_2 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#F44336" penwidth=1.5 style=solid label="assesses" dir=forward]
+	N8 -> nest0_0 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N17 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N9 -> nest1_0 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N2 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	N11 -> S0 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	S0 -> N15 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	S0 -> N13 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> S1 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N15 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	S1 -> N14 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#F44336" penwidth=1.5 style=dashed label="enforces" dir=forward]
+	M0 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	M1 -> N7 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_145.txt

@@ -0,0 +1,34 @@
+<Capacity Building for Local Communities, connectedTo, Cash Transfer Programs>
+<Capacity Building for Local Communities, connectedTo, Reconstruction>
+<Capacity Building for Local Communities, connectedTo, Resilience Building>
+<Cash Transfer Programs, connectedTo, Infrastructure Repair>
+<Communication Protocols, connectedTo, Resilience Building>
+<Debris Management, connectedTo, Communication Protocols>
+<Debris Management, connectedTo, International Aid Coordination>
+<Debris Management, connectedTo, Resilience Building>
+<Debris Management, connectedTo, Resource Mobilization>
+<Early Recovery Actions, connectedTo, International Aid Coordination>
+<Economic Recovery Initiatives, connectedTo, Evacuation Procedures>
+<Evacuation Procedures, connectedTo, International Aid Coordination>
+<Hazard Identification, connectedTo, Debris Management>
+<Hazard Identification, connectedTo, Hazard Mapping>
+<Hazard Mapping, connectedTo, Capacity Building for Local Communities>
+<Hazard Mapping, connectedTo, Debris Management>
+<Hazard Mapping, connectedTo, Policy and Legislation Review>
+<Incident Command System, restores, Debris Management>
+<Infrastructure Repair, connectedTo, Volunteer Coordination>
+<International Aid Coordination, connectedTo, Resource Mobilization>
+<Logistics and Supply Chain, connectedTo, Debris Management>
+<Logistics and Supply Chain, connectedTo, Hazard Identification>
+<Logistics and Supply Chain, connectedTo, Resilience Building>
+<Mitigation Strategies, connectedTo, Economic Recovery Initiatives>
+<Policy and Legislation Review, connectedTo, Mitigation Strategies>
+<Reconstruction, connectedTo, Communication Protocols>
+<Reconstruction, connectedTo, Debris Management>
+<Reconstruction, connectedTo, Incident Command System>
+<Reconstruction, connectedTo, International Aid Coordination>
+<Reconstruction, connectedTo, Risk Assessment>
+<Resilience Building, enforces, International Aid Coordination>
+<Resource Mobilization, connectedTo, Risk Assessment>
+<Risk Assessment, connectedTo, Recovery Planning>
+<Volunteer Coordination, connectedTo, Early Recovery Actions>

test/diagrams/graph_hard/diagrams_148.dot

@@ -0,0 +1,83 @@
+digraph {
+	rankdir=LR
+	N0 [label="Defense Procurement" color="#388E3C" fillcolor="#F1F8E9" shape=database style=filled]
+	N1 [label="Counter_Terrorism Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=action style=filled]
+	N2 [label="Ground Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=document style=filled]
+	N3 [label="Demobilization" color="#CB9BE1" fillcolor="#F2E6F5" shape=rect style=filled]
+	N4 [label="Chaplain Services" color="#388E3C" fillcolor="#F1F8E9" shape=predefinedprocess style=filled]
+	N5 [label="Air Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=inputoutput style=filled]
+	N6 [label="Intelligence Gathering" color="#CB9BE1" fillcolor="#F2E6F5" shape=action style=filled]
+	N7 [label="Space Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=diamond style=filled]
+	N8 [label="Specialized Training" color="#388E3C" fillcolor="#F1F8E9" shape=preparation style=filled]
+	N9 [label="Civil_Military Cooperation" color="#A188DB" fillcolor="#DED7F0" shape=multipledocuments style=filled]
+	N10 [label="Peacekeeping Missions" color="#A188DB" fillcolor="#DED7F0" shape=predefinedprocess style=filled]
+	N11 [label="Recruitment" color="#CB9BE1" fillcolor="#F2E6F5" shape=parallelogram style=filled]
+	N12 [label="Weapon Systems Development" color="#388E3C" fillcolor="#F1F8E9" shape=rectangle style=filled]
+	N13 [label="Force Projection" color="#A188DB" fillcolor="#DED7F0" shape=vnode_shape style=filled]
+	N14 [label="Military Law" color="#CB9BE1" fillcolor="#F2E6F5" shape=database style=filled]
+	N15 [label="Disaster Relief Deployment" color="#CB9BE1" fillcolor="#F2E6F5" shape=hexagon style=filled]
+	S0 [label="" color="#CB9BE1" fillcolor="#F2E6F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#CB9BE1" fillcolor="#F2E6F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#CB9BE1" fillcolor="#F2E6F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#388E3C" fillcolor="#F1F8E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Readiness Assessment {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Readiness Assessment"
+		nest0_0 [label="Personnel Management" color="#388E3C" fillcolor="#F1F8E9" shape=rect style=filled]
+		nest0_1 [label="Medical Support" color="#CB9BE1" fillcolor="#F2E6F5" shape=rectangle style=filled]
+		nest0_2 [label="Family Support Programs" color="#388E3C" fillcolor="#F1F8E9" shape=box style=filled]
+	}
+	subgraph cluster_Counter_Insurgency Operations {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Counter_Insurgency Operations"
+		nest1_0 [label="Unmanned Systems Operation" color="#CB9BE1" fillcolor="#F2E6F5" shape=hexagon style=filled]
+		nest1_1 [label="Military Strategy Development" color="#A188DB" fillcolor="#DED7F0" shape=inputoutput style=filled]
+		nest1_2 [label="Naval Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=rect style=filled]
+		nest1_3 [label="Rules of Engagement" color="#A188DB" fillcolor="#DED7F0" shape=rect style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#A188DB" penwidth=1.5 style=solid label="commands" dir=forward]
+	N2 -> N3 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#A188DB" penwidth=1.5 style=solid label="surveys" dir=forward]
+	N11 -> N12 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N14 [color="#388E3C" penwidth=1.5 style=dashed label="protects" dir=forward]
+	nest1_0 -> nest1_1 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N10 -> nest1_0 [color="#A188DB" penwidth=1.5 style=solid label="attacks" dir=forward]
+	nest1_3 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> S0 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	N6 -> S1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N13 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N15 [color="#CB9BE1" penwidth=1.5 style=dashed label="recruits" dir=forward]
+	S1 -> N8 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#A188DB" penwidth=1.5 style=solid label="trains" dir=forward]
+	N1 -> M0 [color="#CB9BE1" penwidth=1.5 style=dashed label="researches" dir=forward]
+	M0 -> N6 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N5 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_151.txt

@@ -0,0 +1,25 @@
+<Aerospace Engineering, connectedTo, Airport Security Management>
+<Air Cargo Logistics, connectedTo, Aircraft Manufacturing>
+<Air Cargo Logistics, connectedTo, Crew Resource Management>
+<Air Cargo Logistics, connectedTo, Fleet Management>
+<Air Cargo Logistics, connectedTo, Passenger Check_in>
+<Air Cargo Logistics, documents, Weather Briefing>
+<Aircraft Manufacturing, connectedTo, Baggage Handling>
+<Aircraft Manufacturing, connectedTo, Crew Resource Management>
+<Aircraft Manufacturing, connectedTo, Ground Support>
+<Aircraft Manufacturing, connectedTo, Sustainable Aviation Fuel Development>
+<Aircraft Manufacturing, connectedTo, Unmanned Aerial Vehicle Integration>
+<Airport Operations, connectedTo, Crew Resource Management>
+<Airport Operations, connectedTo, Security Screening>
+<Airport Security Management, connectedTo, Passenger Boarding>
+<Aviation Safety Investigation, connectedTo, Aerospace Engineering>
+<Avionics Repair, connectedTo, Fleet Management>
+<Baggage Handling, connectedTo, Ground Support>
+<Fleet Management, connectedTo, Passenger Check_in>
+<Ground Support, connectedTo, Crew Resource Management>
+<Passenger Boarding, connectedTo, Aircraft Manufacturing>
+<Passenger Check_in, connectedTo, Weather Briefing>
+<Security Screening, connectedTo, Passenger Boarding>
+<Sustainable Aviation Fuel Development, connectedTo, Avionics Repair>
+<Unmanned Aerial Vehicle Integration, connectedTo, Aviation Safety Investigation>
+<Weather Briefing, connectedTo, Airport Operations>

test/diagrams/graph_hard/diagrams_153.dot

@@ -0,0 +1,73 @@
+digraph {
+	rankdir=LR
+	N0 [label="Route Optimization" color="#A1887F" fillcolor="#EFEBE9" shape=rect style=filled]
+	N1 [label="Sustainable Aviation Fuel Development" color="#CB9BE1" fillcolor="#F2E6F5" shape=multipledocuments style=filled]
+	N2 [label="In_flight Service" color="#A1887F" fillcolor="#EFEBE9" shape=database style=filled]
+	N3 [label="Security Screening" color="#9575CD" fillcolor="#EDE7F6" shape=action style=filled]
+	N4 [label="Aircraft Maintenance" color="#9575CD" fillcolor="#EDE7F6" shape=rect style=filled]
+	N5 [label="Emergency Procedures Training" color="#A1887F" fillcolor="#EFEBE9" shape=vnode_shape style=filled]
+	N6 [label="Avionics Repair" color="#A1887F" fillcolor="#EFEBE9" shape=action style=filled]
+	N7 [label="Navigation System Check" color="#CB9BE1" fillcolor="#F2E6F5" shape=ellipse style=filled]
+	N8 [label="Aircraft Manufacturing" color="#A1887F" fillcolor="#EFEBE9" shape=box style=filled]
+	N9 [label="Air Cargo Logistics" color="#9575CD" fillcolor="#EDE7F6" shape=hexagon style=filled]
+	N10 [label="Weather Briefing" color="#CB9BE1" fillcolor="#F2E6F5" shape=box style=filled]
+	N11 [label="Gate Assignment" color="#A1887F" fillcolor="#EFEBE9" shape=inputoutput style=filled]
+	N12 [label="Passenger Boarding" color="#CB9BE1" fillcolor="#F2E6F5" shape=rect style=filled]
+	N13 [label="Air Traffic Control" color="#9575CD" fillcolor="#EDE7F6" shape=diamond style=filled]
+	N14 [label="Engine Overhaul" color="#9575CD" fillcolor="#EDE7F6" shape=database style=filled]
+	S0 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Remote Tower Operations {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Remote Tower Operations"
+		nest0_0 [label="Airport Operations" color="#A1887F" fillcolor="#EFEBE9" shape=document style=filled]
+		nest0_1 [label="Airspace Management" color="#A1887F" fillcolor="#EFEBE9" shape=inputoutput style=filled]
+		nest0_2 [label="Fueling Operations" color="#CB9BE1" fillcolor="#F2E6F5" shape=preparation style=filled]
+	}
+	subgraph cluster_Flight Planning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Flight Planning"
+		nest1_0 [label="Runway Management" color="#A1887F" fillcolor="#EFEBE9" shape=multipledocuments style=filled]
+		nest1_1 [label="Regulatory Compliance" color="#9575CD" fillcolor="#EDE7F6" shape=ellipse style=filled]
+		nest1_2 [label="Airworthiness Certification" color="#CB9BE1" fillcolor="#F2E6F5" shape=vnode_shape style=filled]
+	}
+	N0 -> N1 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#9575CD" penwidth=1.5 style=dashed label="investigates" dir=forward]
+	N12 -> N13 [color="#9575CD" penwidth=1.5 style=solid label="navigates" dir=forward]
+	N13 -> N14 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N13 -> nest0_0 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N4 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#A1887F" penwidth=1.5 style=solid label="boards" dir=forward]
+	N3 -> nest1_0 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N6 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N10 -> S0 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N14 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	S0 -> N12 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N7 -> S1 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#A1887F" penwidth=1.5 style=dashed label="trains" dir=forward]
+	S1 -> N14 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#000000" penwidth=1.5 style=dashed label="tests" dir=forward]
+	N7 -> M0 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> M1 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+	N8 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M1 -> N14 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_154.dot

@@ -0,0 +1,88 @@
+digraph {
+	rankdir=RL
+	N0 [label="Autonomous Vehicle Navigation" color="#FFF176" fillcolor="#FFFDE7" shape=parallelogram style=filled]
+	N1 [label="Marine Charting" color="#FFF176" fillcolor="#FFFDE7" shape=diamond style=filled]
+	N2 [label="Digital Compass Integration" color="#FFF176" fillcolor="#FFFDE7" shape=action style=filled]
+	N3 [label="Waypoint Setting" color="#EAEFA5" fillcolor="#FDFCEB" shape=action style=filled]
+	N4 [label="Voice Guidance Customization" color="#EAEFA5" fillcolor="#FDFCEB" shape=vnode_shape style=filled]
+	N5 [label="Traffic Information" color="#FFF176" fillcolor="#FFFDE7" shape=preparation style=filled]
+	N6 [label="Public Transit Navigation" color="#EAEFA5" fillcolor="#FDFCEB" shape=box style=filled]
+	N7 [label="Cycle Route Planning" color="#8C9EFF" fillcolor="#D3D7EB" shape=rectangle style=filled]
+	N8 [label="Location_Based Services" color="#EAEFA5" fillcolor="#FDFCEB" shape=rectangle style=filled]
+	N9 [label="Turn_by_Turn Directions" color="#FFF176" fillcolor="#FFFDE7" shape=multipledocuments style=filled]
+	N10 [label="Augmented Reality Navigation" color="#FFF176" fillcolor="#FFFDE7" shape=database style=filled]
+	N11 [label="Geocoding" color="#EAEFA5" fillcolor="#FDFCEB" shape=multipledocuments style=filled]
+	N12 [label="Points of Interest Search" color="#FFF176" fillcolor="#FFFDE7" shape=vnode_shape style=filled]
+	N13 [label="Satellite Navigation Systems" color="#8C9EFF" fillcolor="#D3D7EB" shape=inputoutput style=filled]
+	N14 [label="GPS Positioning" color="#EAEFA5" fillcolor="#FDFCEB" shape=preparation style=filled]
+	N15 [label="ETA Estimation" color="#FFF176" fillcolor="#FFFDE7" shape=predefinedprocess style=filled]
+	N16 [label="Inertial Navigation System" color="#8C9EFF" fillcolor="#D3D7EB" shape=vnode_shape style=filled]
+	S0 [label="" color="#FFF176" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFF176" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#FFF176" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Reverse Geocoding {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Reverse Geocoding"
+		nest0_0 [label="Altitude Tracking" color="#FFF176" fillcolor="#FFFDE7" shape=diamond style=filled]
+		nest0_1 [label="Geofencing" color="#EAEFA5" fillcolor="#FDFCEB" shape=parallelogram style=filled]
+	}
+	subgraph cluster_Hazard Alerts {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Hazard Alerts"
+		nest1_0 [label="Real_Time Re_routing" color="#8C9EFF" fillcolor="#D3D7EB" shape=predefinedprocess style=filled]
+		nest1_1 [label="Topographic Mapping" color="#FFF176" fillcolor="#FFFDE7" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#8C9EFF" penwidth=1.5 style=solid label="corrects" dir=forward]
+	N2 -> N3 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid label="follows" dir=forward]
+	N5 -> N6 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#8C9EFF" penwidth=1.5 style=solid label="optimizes" dir=forward]
+	N9 -> N10 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#8C9EFF" penwidth=1.5 style=solid label="calibrates" dir=forward]
+	N11 -> N12 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N15 -> N16 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N13 -> nest0_0 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N7 [color="#000000" penwidth=1.5 style=solid label="updates" dir=forward]
+	nest1_0 -> nest1_1 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	N13 -> nest1_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N12 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N8 -> S0 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N14 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S1 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N15 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N16 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N13 -> S2 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	S2 -> N16 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S2 -> N15 [color="#8C9EFF" penwidth=1.5 style=dashed label="plans" dir=forward]
+	N2 -> M0 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N3 -> M0 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	M0 -> N6 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#8C9EFF" penwidth=1.5 style=dashed label="guides" dir=forward]
+	N4 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M1 -> N7 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M2 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M2 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	M2 -> N6 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_159.txt

@@ -0,0 +1,26 @@
+<3D Printed Tooling, connectedTo, 4D Printing>
+<3D Printed Tooling, connectedTo, Digital Twin for 3D Prints>
+<3D Printed Tooling, connectedTo, Troubleshooting Print Errors>
+<3D Printed Tooling, shares, Intellectual Property Protection for Designs>
+<4D Printing, connectedTo, Troubleshooting Print Errors>
+<Aerospace Part Production, connectedTo, Maintenance and Repair of Printers>
+<Bioprinting, connectedTo, File Format Conversion>
+<Digital Twin for 3D Prints, connectedTo, Fused Deposition Modeling>
+<Digital Twin for 3D Prints, connectedTo, Intellectual Property Protection for Designs>
+<Digital Twin for 3D Prints, connectedTo, Troubleshooting Print Errors>
+<Distributed Manufacturing, connectedTo, Material Research and Development>
+<File Format Conversion, connectedTo, Distributed Manufacturing>
+<Intellectual Property Protection for Designs, connectedTo, 4D Printing>
+<Maintenance and Repair of Printers, connectedTo, On_Demand Production>
+<Material Research and Development, connectedTo, 3D Printed Tooling>
+<Material Research and Development, connectedTo, Digital Twin for 3D Prints>
+<Material Research and Development, connectedTo, Fused Deposition Modeling>
+<Material Research and Development, connectedTo, Intellectual Property Protection for Designs>
+<Material Research and Development, connectedTo, Prototyping>
+<Material Research and Development, connectedTo, Slicing Software Operation>
+<Medical Device Prototyping, connectedTo, Digital Twin for 3D Prints>
+<Medical Device Prototyping, connectedTo, Material Research and Development>
+<On_Demand Production, connectedTo, Intellectual Property Protection for Designs>
+<Prototyping, connectedTo, Aerospace Part Production>
+<Slicing Software Operation, connectedTo, Bioprinting>
+<Troubleshooting Print Errors, connectedTo, Fused Deposition Modeling>

test/diagrams/graph_hard/diagrams_160.dot

@@ -0,0 +1,74 @@
+digraph {
+	rankdir=LR
+	N0 [label="Ethical Implications of Nanotech" color="#61CAC3" fillcolor="#C2E8E6" shape=diamond style=filled]
+	N1 [label="Water Purification using Nanomaterials" color="#FFEB3B" fillcolor="#FFF9C4" shape=database style=filled]
+	N2 [label="Bio_Nanotechnology Interface" color="#FFE69C" fillcolor="#FFF9D4" shape=rectangle style=filled]
+	N3 [label="Atomic Force Microscopy" color="#FFEB3B" fillcolor="#FFF9C4" shape=inputoutput style=filled]
+	N4 [label="Public Perception of Nanotechnology" color="#FFE69C" fillcolor="#FFF9D4" shape=diamond style=filled]
+	N5 [label="Nanomaterial Synthesis" color="#FFE69C" fillcolor="#FFF9D4" shape=predefinedprocess style=filled]
+	N6 [label="Lab_on_a_Chip Devices" color="#FFE69C" fillcolor="#FFF9D4" shape=inputoutput style=filled]
+	N7 [label="Energy Storage Applications" color="#61CAC3" fillcolor="#C2E8E6" shape=predefinedprocess style=filled]
+	N8 [label="Nanoscale Imaging" color="#61CAC3" fillcolor="#C2E8E6" shape=database style=filled]
+	N9 [label="Photovoltaics" color="#FFE69C" fillcolor="#FFF9D4" shape=diamond style=filled]
+	N10 [label="Environmental Remediation with Nanomaterials" color="#61CAC3" fillcolor="#C2E8E6" shape=vnode_shape style=filled]
+	N11 [label="Nanosensors" color="#61CAC3" fillcolor="#C2E8E6" shape=document style=filled]
+	N12 [label="Transmission Electron Microscopy" color="#61CAC3" fillcolor="#C2E8E6" shape=vnode_shape style=filled]
+	S1 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFEB3B" fillcolor="#FFF9C4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFEB3B" fillcolor="#FFF9C4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Nanotoxicology {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Nanotoxicology"
+		nest0_0 [label="Spectroscopy" color="#FFE69C" fillcolor="#FFF9D4" shape=parallelogram style=filled]
+		nest0_1 [label="Graphene Production" color="#61CAC3" fillcolor="#C2E8E6" shape=predefinedprocess style=filled]
+	}
+	subgraph cluster_Quantum Dots {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Quantum Dots"
+		nest1_0 [label="Drug Delivery Systems" color="#FFE69C" fillcolor="#FFF9D4" shape=ellipse style=filled]
+		nest1_1 [label="Nanoparticle Characterization" color="#FFE69C" fillcolor="#FFF9D4" shape=database style=filled]
+		nest1_2 [label="Nanodevice Fabrication" color="#61CAC3" fillcolor="#C2E8E6" shape=predefinedprocess style=filled]
+		nest1_3 [label="Scanning Electron Microscopy" color="#61CAC3" fillcolor="#C2E8E6" shape=box style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#FFEB3B" penwidth=1.5 style=solid label="converts" dir=forward]
+	N4 -> N5 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed label="commercializes" dir=forward]
+	N7 -> N8 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#FFEB3B" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N11 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N12 [color="#FFE69C" penwidth=1.5 style=dashed label="controls" dir=forward]
+	nest1_0 -> nest1_1 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N8 -> nest1_0 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	nest1_3 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> S1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N12 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N11 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	S2 -> N4 [color="#FFEB3B" penwidth=1.5 style=dashed label="detects" dir=forward]
+	S2 -> N7 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N8 -> M0 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> M0 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N10 [color="#FFEB3B" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M1 [color="#FFE69C" penwidth=1.5 style=dashed label="enhances" dir=forward]
+	N3 -> M1 [color="#FFEB3B" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M1 [color="#61CAC3" penwidth=1.5 style=dashed label="designs" dir=forward]
+	N1 -> M1 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	M1 -> N7 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_174.txt

@@ -0,0 +1,37 @@
+<A&R, connectedTo, Instrumental Performance>
+<Beat Making, connectedTo, Merchandise Sales>
+<Beat Making, connectedTo, Music Festival Organization>
+<Beat Making, connectedTo, Music Production>
+<Concert Promotion, connectedTo, Beat Making>
+<Concert Promotion, connectedTo, Mixing>
+<Concert Promotion, connectedTo, Performance>
+<Concert Promotion, transcribes, Synthesizer Programming>
+<Digital Audio Workstation Operation, connectedTo, Concert Promotion>
+<Fan Engagement Strategy, connectedTo, Digital Audio Workstation Operation>
+<Instrumental Performance, connectedTo, Tour Management>
+<Mastering, connectedTo, Digital Audio Workstation Operation>
+<Merchandise Sales, connectedTo, Record Label Operations>
+<Mixing, connectedTo, Music for Film or TV or Games>
+<Music Distribution, connectedTo, Sampling>
+<Music Education, connectedTo, Sound System Design>
+<Music Festival Organization, connectedTo, Songwriting>
+<Music Production, produces, Music Video Production>
+<Music Theory Analysis, connectedTo, A&R>
+<Music Therapy, connectedTo, A&R>
+<Music Therapy, connectedTo, Beat Making>
+<Music Therapy, connectedTo, Fan Engagement Strategy>
+<Music Therapy, connectedTo, Music Distribution>
+<Music Therapy, connectedTo, Sampling>
+<Music Video Production, connectedTo, Performance>
+<Performance, connectedTo, Mixing>
+<Record Label Operations, connectedTo, Royalty Collection>
+<Royalty Collection, connectedTo, Mastering>
+<Sampling, streams, Beat Making>
+<Songwriting, connectedTo, Mixing>
+<Sound System Design, connectedTo, A&R>
+<Sound System Design, connectedTo, Vocal Performance>
+<Synthesizer Programming, connectedTo, A&R>
+<Synthesizer Programming, connectedTo, Music Distribution>
+<Synthesizer Programming, connectedTo, Music Theory Analysis>
+<Tour Management, connectedTo, Music Distribution>
+<Vocal Performance, connectedTo, Music Therapy>

test/diagrams/graph_hard/diagrams_186.dot

@@ -0,0 +1,68 @@
+digraph {
+	rankdir=TB
+	N0 [label="Cloud BI Solutions" color="#80DDEA" fillcolor="#D3F7F9" shape=rect style=filled]
+	N1 [label="Query Optimization" color="#EAEFA5" fillcolor="#FDFCEB" shape=document style=filled]
+	N2 [label="Data Source Integration" color="#A2D0FF" fillcolor="#E8F0FF" shape=box style=filled]
+	N3 [label="Data Mart Design" color="#80DDEA" fillcolor="#D3F7F9" shape=hexagon style=filled]
+	N4 [label="Prescriptive Analytics Implementation" color="#EAEFA5" fillcolor="#FDFCEB" shape=box style=filled]
+	N5 [label="Data Storytelling for Business" color="#80DDEA" fillcolor="#D3F7F9" shape=preparation style=filled]
+	N6 [label="Data Security in BI" color="#80DDEA" fillcolor="#D3F7F9" shape=diamond style=filled]
+	N7 [label="Supply Chain Optimization" color="#80DDEA" fillcolor="#D3F7F9" shape=rectangle style=filled]
+	N8 [label="Customer Behavior Insights" color="#80DDEA" fillcolor="#D3F7F9" shape=multipledocuments style=filled]
+	N9 [label="Data Lineage Tracking" color="#EAEFA5" fillcolor="#FDFCEB" shape=rectangle style=filled]
+	N10 [label="Sales Forecasting" color="#A2D0FF" fillcolor="#E8F0FF" shape=database style=filled]
+	S0 [label="" color="#80DDEA" fillcolor="#D3F7F9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#A2D0FF" fillcolor="#E8F0FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#A2D0FF" fillcolor="#E8F0FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Master Data Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Master Data Management"
+		nest0_0 [label="Risk Assessment Reporting" color="#80DDEA" fillcolor="#D3F7F9" shape=rect style=filled]
+		nest0_1 [label="Actionable Insights Generation" color="#80DDEA" fillcolor="#D3F7F9" shape=inputoutput style=filled]
+		nest0_2 [label="Regulatory Compliance Reporting" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+	}
+	subgraph cluster_Executive Summary Reporting {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Executive Summary Reporting"
+		nest1_0 [label="Real_time BI Dashboards" color="#EAEFA5" fillcolor="#FDFCEB" shape=rectangle style=filled]
+		nest1_1 [label="Data Quality Management" color="#EAEFA5" fillcolor="#FDFCEB" shape=predefinedprocess style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid label="supports" dir=forward]
+	N5 -> N6 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#EAEFA5" penwidth=1.5 style=solid label="manages" dir=forward]
+	N6 -> nest0_0 [color="#80DDEA" penwidth=1.5 style=dashed label="optimizes" dir=forward]
+	nest0_2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	N8 -> nest1_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N1 [color="#A2D0FF" penwidth=1.5 style=solid dir=forward]
+	N0 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N3 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N5 [color="#EAEFA5" penwidth=1.5 style=solid label="monitors" dir=forward]
+	N4 -> S1 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#A2D0FF" penwidth=1.5 style=solid label="deploys" dir=forward]
+	S1 -> N7 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S2 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N7 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#A2D0FF" penwidth=1.5 style=dashed label="self_serves" dir=forward]
+	N0 -> M0 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N3 [color="#A2D0FF" penwidth=1.5 style=solid dir=forward]
+	N7 -> M2 [color="#A2D0FF" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M2 [color="#A2D0FF" penwidth=1.5 style=solid dir=forward]
+	M2 -> N9 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_201.txt

@@ -0,0 +1,36 @@
+<Backer Communication, connectedTo, Email List Building>
+<Backer Communication, connectedTo, Goal Setting>
+<Campaign Creation, connectedTo, International Crowdfunding>
+<Debt Crowdfunding, connectedTo, Platform Selection>
+<Donation_Based Crowdfunding, connectedTo, Investor Verification>
+<Email List Building, connectedTo, Donation_Based Crowdfunding>
+<Email List Building, connectedTo, Funding Period Management>
+<Email List Building, connectedTo, Logistics for Rewards>
+<Email List Building, connectedTo, Social Media Promotion>
+<Email List Building, connectedTo, Success Fee Structures>
+<Fulfillment Planning, connectedTo, Video Production for Campaigns>
+<Funding Period Management, connectedTo, Campaign Creation>
+<Goal Setting, connectedTo, Payment Processing>
+<Intellectual Property Protection, connectedTo, Logistics for Rewards>
+<Intellectual Property Protection, connectedTo, Social Media Promotion>
+<International Crowdfunding, connectedTo, Legal Compliance>
+<Investor Verification, connectedTo, Due Diligence for Projects>
+<Investor Verification, connectedTo, International Crowdfunding>
+<Investor Verification, connectedTo, Legal Compliance>
+<Investor Verification, connectedTo, Marketing Strategy>
+<Legal Compliance, connectedTo, Due Diligence for Projects>
+<Logistics for Rewards, connectedTo, Funding Period Management>
+<Marketing Strategy, connectedTo, Logistics for Rewards>
+<Payment Processing, connectedTo, Fulfillment Planning>
+<Platform Fee Management, connectedTo, Donation_Based Crowdfunding>
+<Platform Selection, connectedTo, Backer Communication>
+<Post_Campaign Updates, connectedTo, Project Vetting>
+<Project Vetting, connectedTo, International Crowdfunding>
+<Real Estate Crowdfunding, connectedTo, Shareholder Management>
+<Shareholder Management, connectedTo, Post_Campaign Updates>
+<Social Media Promotion, connectedTo, Logistics for Rewards>
+<Social Media Promotion, connectedTo, Platform Fee Management>
+<Social Media Promotion, connectedTo, Real Estate Crowdfunding>
+<Success Fee Structures, connectedTo, Intellectual Property Protection>
+<Success Fee Structures, measures success, Logistics for Rewards>
+<Video Production for Campaigns, connectedTo, Marketing Strategy>

test/diagrams/graph_hard/diagrams_203.dot

@@ -0,0 +1,84 @@
+digraph {
+	rankdir=LR
+	N0 [label="Blockchain for IoT Security" color="#E57373" fillcolor="#FFEBEE" shape=rectangle style=filled]
+	N1 [label="Smart Manufacturing" color="#FFCC80" fillcolor="#FFF0CC" shape=database style=filled]
+	N2 [label="Data Processing at Edge" color="#FF8A65" fillcolor="#FBE9E7" shape=document style=filled]
+	N3 [label="Security Implementation" color="#E57373" fillcolor="#FFEBEE" shape=vnode_shape style=filled]
+	N4 [label="Agricultural IoT" color="#E57373" fillcolor="#FFEBEE" shape=hexagon style=filled]
+	N5 [label="Sensor Integration" color="#FF8A65" fillcolor="#FBE9E7" shape=hexagon style=filled]
+	N6 [label="Interoperability Standards" color="#FF8A65" fillcolor="#FBE9E7" shape=rect style=filled]
+	N7 [label="Over_the_Air Updates" color="#FFCC80" fillcolor="#FFF0CC" shape=predefinedprocess style=filled]
+	N8 [label="Edge Computing for IoT" color="#FF8A65" fillcolor="#FBE9E7" shape=hexagon style=filled]
+	N9 [label="Retail IoT" color="#FF8A65" fillcolor="#FBE9E7" shape=ellipse style=filled]
+	N10 [label="Transportation IoT" color="#FF8A65" fillcolor="#FBE9E7" shape=rectangle style=filled]
+	N11 [label="Smart City Sensors" color="#FFCC80" fillcolor="#FFF0CC" shape=hexagon style=filled]
+	N12 [label="Supply Chain Optimization" color="#FFCC80" fillcolor="#FFF0CC" shape=vnode_shape style=filled]
+	N13 [label="IoT Device Certification" color="#FF8A65" fillcolor="#FBE9E7" shape=predefinedprocess style=filled]
+	N14 [label="Network Protocol Selection" color="#E57373" fillcolor="#FFEBEE" shape=rect style=filled]
+	N15 [label="Data Privacy in IoT" color="#FFCC80" fillcolor="#FFF0CC" shape=box style=filled]
+	N16 [label="Remote Monitoring and Control" color="#FF8A65" fillcolor="#FBE9E7" shape=ellipse style=filled]
+	N17 [label="Connected Vehicles" color="#E57373" fillcolor="#FFEBEE" shape=multipledocuments style=filled]
+	N18 [label="Power Management for Devices" color="#FFCC80" fillcolor="#FFF0CC" shape=rectangle style=filled]
+	S0 [label="" color="#FF8A65" fillcolor="#FBE9E7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FF8A65" fillcolor="#FBE9E7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Real_time Data Streaming {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Real_time Data Streaming"
+		nest0_0 [label="Asset Tracking" color="#E57373" fillcolor="#FFEBEE" shape=multipledocuments style=filled]
+		nest0_1 [label="Healthcare IoT Devices" color="#FFCC80" fillcolor="#FFF0CC" shape=parallelogram style=filled]
+	}
+	subgraph cluster_Compliance with IoT Regulations {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Compliance with IoT Regulations"
+		nest1_0 [label="Data Analysis in Cloud" color="#FFCC80" fillcolor="#FFF0CC" shape=multipledocuments style=filled]
+		nest1_1 [label="Device Prototyping" color="#FFCC80" fillcolor="#FFF0CC" shape=box style=filled]
+		nest1_2 [label="Gateway Development" color="#FF8A65" fillcolor="#FBE9E7" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#FFCC80" penwidth=1.5 style=solid label="builds smart cities" dir=forward]
+	N13 -> N14 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	N15 -> N16 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N16 -> N17 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N17 -> N18 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest0_0 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N6 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest1_0 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N3 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N8 -> S0 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N16 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	S0 -> N12 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N15 -> S1 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N18 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N17 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N7 -> M0 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	N5 -> M0 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	M0 -> N16 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N4 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N6 [color="#FF8A65" penwidth=1.5 style=solid dir=forward]
+	N0 -> M2 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	N15 -> M2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M2 -> N18 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_222.dot

@@ -0,0 +1,74 @@
+digraph {
+	rankdir=LR
+	N0 [label="FPGA Design" color="#2196F3" fillcolor="#BBDEFB" shape=document style=filled]
+	N1 [label="Intellectual Property Protection" color="#8C9EFF" fillcolor="#D3D7EB" shape=database style=filled]
+	N2 [label="Reliability Testing" color="#8C9EFF" fillcolor="#D3D7EB" shape=vnode_shape style=filled]
+	N3 [label="Mechanical Design Integration" color="#2196F3" fillcolor="#BBDEFB" shape=database style=filled]
+	N4 [label="Prototyping" color="#2196F3" fillcolor="#BBDEFB" shape=predefinedprocess style=filled]
+	N5 [label="Mixed_Signal Design" color="#A188D0" fillcolor="#DACBE3" shape=rectangle style=filled]
+	N6 [label="PCB Layout" color="#2196F3" fillcolor="#BBDEFB" shape=document style=filled]
+	N7 [label="Test Fixture Design" color="#2196F3" fillcolor="#BBDEFB" shape=parallelogram style=filled]
+	N8 [label="Testing and Validation" color="#A188D0" fillcolor="#DACBE3" shape=preparation style=filled]
+	N9 [label="Circuit Design" color="#A188D0" fillcolor="#DACBE3" shape=parallelogram style=filled]
+	N10 [label="Power Integrity Analysis" color="#8C9EFF" fillcolor="#D3D7EB" shape=rect style=filled]
+	N11 [label="Documentation" color="#8C9EFF" fillcolor="#D3D7EB" shape=predefinedprocess style=filled]
+	N12 [label="Reverse Engineering" color="#2196F3" fillcolor="#BBDEFB" shape=rect style=filled]
+	N13 [label="Manufacturing Process Planning" color="#2196F3" fillcolor="#BBDEFB" shape=box style=filled]
+	N14 [label="Material Selection" color="#8C9EFF" fillcolor="#D3D7EB" shape=action style=filled]
+	S0 [label="" color="#A188D0" fillcolor="#DACBE3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#8C9EFF" fillcolor="#D3D7EB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#2196F3" fillcolor="#BBDEFB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#2196F3" fillcolor="#BBDEFB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Schematic Capture {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Schematic Capture"
+		nest0_0 [label="Failure Analysis" color="#2196F3" fillcolor="#BBDEFB" shape=diamond style=filled]
+		nest0_1 [label="Thermal Management" color="#A188D0" fillcolor="#DACBE3" shape=multipledocuments style=filled]
+		nest0_2 [label="Assembly Line Optimization" color="#8C9EFF" fillcolor="#D3D7EB" shape=document style=filled]
+	}
+	subgraph cluster_High_Speed Digital Design {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="High_Speed Digital Design"
+		nest1_0 [label="Optical Module Design" color="#A188D0" fillcolor="#DACBE3" shape=box style=filled]
+		nest1_1 [label="Low_Power Design" color="#8C9EFF" fillcolor="#D3D7EB" shape=ellipse style=filled]
+		nest1_2 [label="Cable Management" color="#8C9EFF" fillcolor="#D3D7EB" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=solid label="creates documentation" dir=forward]
+	N11 -> N12 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N6 -> nest0_0 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N4 -> nest1_0 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N1 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N8 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	S0 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N3 [color="#A188D0" penwidth=1.5 style=dashed label="designs optical systems" dir=forward]
+	N1 -> S1 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N8 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	S1 -> N3 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N5 -> S2 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N10 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	N9 -> M0 [color="#8C9EFF" penwidth=1.5 style=solid label="develops RF systems" dir=forward]
+	N2 -> M0 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N11 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_237.dot

@@ -0,0 +1,56 @@
+digraph {
+	rankdir=RL
+	N0 [label="Student Progress Tracking" color="#FFF8A6" fillcolor="#FFFDE0" shape=vnode_shape style=filled]
+	N1 [label="Discussion Forum Moderation" color="#FFD54F" fillcolor="#FFF8E1" shape=box style=filled]
+	N2 [label="Instructor Training" color="#00BCD4" fillcolor="#B2EBF2" shape=ellipse style=filled]
+	N3 [label="Virtual Classroom Facilitation" color="#FFD54F" fillcolor="#FFF8E1" shape=multipledocuments style=filled]
+	N4 [label="Bootcamp Development" color="#FFF8A6" fillcolor="#FFFDE0" shape=vnode_shape style=filled]
+	N5 [label="Digital Badges" color="#00BCD4" fillcolor="#B2EBF2" shape=rectangle style=filled]
+	N6 [label="Peer_to_Peer Learning" color="#00BCD4" fillcolor="#B2EBF2" shape=database style=filled]
+	N7 [label="Certification Issuance" color="#FFD54F" fillcolor="#FFF8E1" shape=inputoutput style=filled]
+	N8 [label="Curriculum Development" color="#FFF8A6" fillcolor="#FFFDE0" shape=predefinedprocess style=filled]
+	N9 [label="Blended Learning Models" color="#FFF8A6" fillcolor="#FFFDE0" shape=database style=filled]
+	S0 [label="" color="#00BCD4" fillcolor="#B2EBF2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#00BCD4" fillcolor="#B2EBF2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#FFF8A6" fillcolor="#FFFDE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Competency_Based Education {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Competency_Based Education"
+		nest0_0 [label="Open Educational Resources Integration" color="#FFD54F" fillcolor="#FFF8E1" shape=document style=filled]
+		nest0_1 [label="Accessibility Features" color="#FFF8A6" fillcolor="#FFFDE0" shape=box style=filled]
+	}
+	subgraph cluster_Accreditation Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Accreditation Management"
+		nest1_0 [label="Course Design" color="#00BCD4" fillcolor="#B2EBF2" shape=action style=filled]
+		nest1_1 [label="Language Learning Platforms" color="#00BCD4" fillcolor="#B2EBF2" shape=box style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#00BCD4" penwidth=1.5 style=solid label="provides feedback" dir=forward]
+	N3 -> N4 [color="#FFF8A6" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed label="secures platforms" dir=forward]
+	N5 -> N6 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#FFD54F" penwidth=1.5 style=solid label="facilitates discussions" dir=forward]
+	N7 -> N8 [color="#FFF8A6" penwidth=1.5 style=dashed label="administers assessments" dir=forward]
+	N8 -> N9 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N1 [color="#FFF8A6" penwidth=1.5 style=dashed label="uses adaptive systems" dir=forward]
+	nest1_0 -> nest1_1 [color="#FFF8A6" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest1_0 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N9 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N6 -> S0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N9 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N3 -> S1 [color="#FFF8A6" penwidth=1.5 style=solid dir=forward]
+	S1 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N9 [color="#FFF8A6" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N0 -> S2 [color="#FFF8A6" penwidth=1.5 style=solid dir=forward]
+	S2 -> N7 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	S2 -> N6 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	S2 -> N8 [color="#FFF8A6" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_239.txt

@@ -0,0 +1,30 @@
+<Assessment Creation, connectedTo, Completion Rate Optimization>
+<Completion Rate Optimization, connectedTo, Global Accessibility Features>
+<Completion Rate Optimization, connectedTo, Learner Feedback Analysis>
+<Completion Rate Optimization, connectedTo, Micro_credential Stacking>
+<Completion Rate Optimization, connectedTo, Skill_Based Learning Outcomes>
+<Completion Rate Optimization, connectedTo, Specialization or Professional Certificate Programs>
+<Content Licensing, connectedTo, Continuous Course Improvement>
+<Content Licensing, connectedTo, Engagement Metrics Tracking>
+<Continuous Course Improvement, connectedTo, Course Promotion>
+<Corporate Training Solutions, connectedTo, Content Licensing>
+<Course Promotion, connectedTo, Corporate Training Solutions>
+<Engagement Metrics Tracking, connectedTo, Verified Track Management>
+<Global Accessibility Features, connectedTo, Learner Feedback Analysis>
+<Global Accessibility Features, connectedTo, Skill_Based Learning Outcomes>
+<Industry Collaboration for Content, connectedTo, University Partnerships>
+<Learner Feedback Analysis, connectedTo, Micro_credential Stacking>
+<Micro_credential Stacking, connectedTo, Content Licensing>
+<Micro_credential Stacking, connectedTo, Engagement Metrics Tracking>
+<Micro_credential Stacking, connectedTo, Specialization or Professional Certificate Programs>
+<Micro_credential Stacking, connectedTo, Technical Infrastructure for Scale>
+<Micro_credential Stacking, connectedTo, Verified Track Management>
+<Skill_Based Learning Outcomes, connectedTo, Learner Feedback Analysis>
+<Specialization or Professional Certificate Programs, connectedTo, Career Pathway Mapping>
+<Specialization or Professional Certificate Programs, connectedTo, Engagement Metrics Tracking>
+<Specialization or Professional Certificate Programs, connectedTo, Industry Collaboration for Content>
+<Specialization or Professional Certificate Programs, connectedTo, Technical Infrastructure for Scale>
+<Specialization or Professional Certificate Programs, connectedTo, Verified Track Management>
+<Technical Infrastructure for Scale, connectedTo, Content Licensing>
+<University Partnerships, connectedTo, Skill_Based Learning Outcomes>
+<Verified Track Management, connectedTo, Career Pathway Mapping>

test/diagrams/graph_hard/diagrams_245.txt

@@ -0,0 +1,37 @@
+<Accent Reduction Coaching, connectedTo, Speech Recognition Technology>
+<Accent Reduction Coaching, practices, Self_Study Modules>
+<Adult Language Learning, connectedTo, Travel Language Essentials>
+<Audio Lessons, connectedTo, Accent Reduction Coaching>
+<Audio Lessons, connectedTo, Self_Study Modules>
+<Business Language Training, connectedTo, Audio Lessons>
+<Gamified Learning Activities, connectedTo, Audio Lessons>
+<Gamified Learning Activities, connectedTo, Grammar Practice>
+<Gamified Learning Activities, connectedTo, Role_Playing Scenarios>
+<Gamified Learning Activities, connectedTo, Speaking Practice>
+<Gamified Learning Activities, connectedTo, Speech Recognition Technology>
+<Gamified Learning Activities, distributes, Listening Comprehension>
+<Gamified Learning Activities, publishes, Role_Playing Scenarios>
+<Grammar Practice, connectedTo, Role_Playing Scenarios>
+<Grammar Practice, connectedTo, Translation Exercises>
+<Instructor_Led Classes, connectedTo, Pronunciation Drills>
+<Listening Comprehension, connectedTo, Role_Playing Scenarios>
+<Personalized Learning Paths, connectedTo, Audio Lessons>
+<Pronunciation Drills, writes, Reading Comprehension>
+<Reading Comprehension, connectedTo, Business Language Training>
+<Self_Study Modules, analyzes, Role_Playing Scenarios>
+<Self_Study Modules, connectedTo, Grammar Practice>
+<Self_Study Modules, connectedTo, Listening Comprehension>
+<Self_Study Modules, connectedTo, Role_Playing Scenarios>
+<Self_Study Modules, connectedTo, Translation Exercises>
+<Speaking Practice, connectedTo, Adult Language Learning>
+<Speaking Practice, connectedTo, Audio Lessons>
+<Speaking Practice, connectedTo, Instructor_Led Classes>
+<Speaking Practice, connectedTo, Role_Playing Scenarios>
+<Speaking Practice, connectedTo, Self_Study Modules>
+<Speech Recognition Technology, connectedTo, Listening Comprehension>
+<Speech Recognition Technology, connectedTo, Self_Study Modules>
+<Speech Recognition Technology, connectedTo, Translation Exercises>
+<Translation Exercises, connectedTo, Listening Comprehension>
+<Translation Exercises, connectedTo, Role_Playing Scenarios>
+<Travel Language Essentials, translates, Personalized Learning Paths>
+<Vocabulary Acquisition, connectedTo, Gamified Learning Activities>

test/diagrams/graph_hard/diagrams_249.dot

@@ -0,0 +1,65 @@
+digraph {
+	rankdir=RL
+	N0 [label="Dialectical Behavior Therapy" color="#2196F3" fillcolor="#BBDEFB" shape=database style=filled]
+	N1 [label="Post_Traumatic Stress Disorder Support" color="#2196F3" fillcolor="#BBDEFB" shape=inputoutput style=filled]
+	N2 [label="Suicide Prevention" color="#61CAC3" fillcolor="#C2E8E6" shape=action style=filled]
+	N3 [label="Telehealth Counseling" color="#2196F3" fillcolor="#BBDEFB" shape=multipledocuments style=filled]
+	N4 [label="Medication Management" color="#FFE69C" fillcolor="#FFF9D4" shape=rectangle style=filled]
+	N5 [label="Grief Counseling" color="#2196F3" fillcolor="#BBDEFB" shape=document style=filled]
+	S0 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#61CAC3" fillcolor="#C2E8E6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#2196F3" fillcolor="#BBDEFB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#2196F3" fillcolor="#BBDEFB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Mindfulness Practice {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Mindfulness Practice"
+		nest0_0 [label="Support Group Facilitation" color="#61CAC3" fillcolor="#C2E8E6" shape=parallelogram style=filled]
+		nest0_1 [label="Psychiatric Evaluation" color="#61CAC3" fillcolor="#C2E8E6" shape=rectangle style=filled]
+		nest0_2 [label="Music Therapy" color="#FFE69C" fillcolor="#FFF9D4" shape=diamond style=filled]
+		nest0_3 [label="Trauma Therapy" color="#FFE69C" fillcolor="#FFF9D4" shape=rect style=filled]
+	}
+	subgraph cluster_Bipolar Disorder Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Bipolar Disorder Management"
+		nest1_0 [label="Recreational Therapy" color="#2196F3" fillcolor="#BBDEFB" shape=action style=filled]
+		nest1_1 [label="Cognitive Behavioral Therapy" color="#FFE69C" fillcolor="#FFF9D4" shape=document style=filled]
+		nest1_2 [label="Stress Reduction Techniques" color="#61CAC3" fillcolor="#C2E8E6" shape=hexagon style=filled]
+		nest1_3 [label="Treatment Plan Development" color="#61CAC3" fillcolor="#C2E8E6" shape=vnode_shape style=filled]
+	}
+	N0 -> N1 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=dashed label="audits" dir=forward]
+	N2 -> nest0_0 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N5 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest1_0 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N0 -> S0 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N5 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N2 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S1 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	S1 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N5 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N0 -> S2 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N2 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N4 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N4 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M2 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	M2 -> N4 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_255.dot

@@ -0,0 +1,64 @@
+digraph {
+	rankdir=TB
+	N0 [label="Community Fitness Challenges" color="#4FC3F7" fillcolor="#E1F5FE" shape=hexagon style=filled]
+	N1 [label="Wearable Fitness Devices" color="#E57373" fillcolor="#FFEBEE" shape=vnode_shape style=filled]
+	N2 [label="Senior Fitness Programs" color="#FFCC7A" fillcolor="#FFF6D9" shape=box style=filled]
+	N3 [label="Strength Training" color="#FFCC7A" fillcolor="#FFF6D9" shape=document style=filled]
+	N4 [label="Pilates Instruction" color="#FFCC7A" fillcolor="#FFF6D9" shape=rect style=filled]
+	N5 [label="Cross_Training" color="#E57373" fillcolor="#FFEBEE" shape=rect style=filled]
+	N6 [label="Fitness Assessment" color="#FFCC7A" fillcolor="#FFF6D9" shape=rect style=filled]
+	N7 [label="Online Fitness Coaching" color="#E57373" fillcolor="#FFEBEE" shape=inputoutput style=filled]
+	N8 [label="Outdoor Fitness Activities" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+	N9 [label="Weightlifting Techniques" color="#FFCC7A" fillcolor="#FFF6D9" shape=preparation style=filled]
+	N10 [label="Personalized Exercise Prescriptions" color="#E57373" fillcolor="#FFEBEE" shape=inputoutput style=filled]
+	S1 [label="" color="#FFCC7A" fillcolor="#FFF6D9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#4FC3F7" fillcolor="#E1F5FE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFCC7A" fillcolor="#FFF6D9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Corporate Wellness Programs {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Corporate Wellness Programs"
+		nest0_0 [label="Biometric Feedback Integration" color="#E57373" fillcolor="#FFEBEE" shape=multipledocuments style=filled]
+		nest0_1 [label="Nutrition for Fitness" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+		nest0_2 [label="Fitness Equipment Maintenance" color="#FFCC7A" fillcolor="#FFF6D9" shape=rectangle style=filled]
+	}
+	subgraph cluster_Balance and Coordination {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Balance and Coordination"
+		nest1_0 [label="Home Workout Programs" color="#4FC3F7" fillcolor="#E1F5FE" shape=document style=filled]
+		nest1_1 [label="Workout Tracking Apps" color="#FFCC7A" fillcolor="#FFF6D9" shape=predefinedprocess style=filled]
+	}
+	N0 -> N1 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#FFCC7A" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#FFCC7A" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#FFCC7A" penwidth=1.5 style=dashed label="certifies" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#FFCC7A" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#FFCC7A" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#4FC3F7" penwidth=1.5 style=dashed label="advises" dir=forward]
+	nest0_0 -> nest0_1 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest1_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> N10 [color="#FFCC7A" penwidth=1.5 style=solid dir=forward]
+	N6 -> S1 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N8 [color="#FFCC7A" penwidth=1.5 style=solid dir=forward]
+	N2 -> S2 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	S2 -> N10 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N7 [color="#FFCC7A" penwidth=1.5 style=solid label="predicts" dir=forward]
+	S2 -> N9 [color="#FFCC7A" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M0 -> N8 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#FFCC7A" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N3 [color="#FFCC7A" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_259.dot

@@ -0,0 +1,66 @@
+digraph {
+	rankdir=BT
+	N0 [label="Textile and Fabric Selection" color="#7986CB" fillcolor="#E8EAF6" shape=predefinedprocess style=filled]
+	N1 [label="Mood Board Creation" color="#7E57C2" fillcolor="#D1C4E9" shape=vnode_shape style=filled]
+	N2 [label="Living Room Design" color="#7986CB" fillcolor="#E8EAF6" shape=diamond style=filled]
+	N3 [label="Residential Interior Design" color="#7986CB" fillcolor="#E8EAF6" shape=document style=filled]
+	N4 [label="Concept Development" color="#7E57C2" fillcolor="#D1C4E9" shape=database style=filled]
+	N5 [label="Office Space Design" color="#FF9800" fillcolor="#FFE0B2" shape=ellipse style=filled]
+	N6 [label="Building Code Compliance" color="#7E57C2" fillcolor="#D1C4E9" shape=database style=filled]
+	N7 [label="Hospitality Interior Design" color="#FF9800" fillcolor="#FFE0B2" shape=vnode_shape style=filled]
+	N8 [label="Commercial Interior Design" color="#7E57C2" fillcolor="#D1C4E9" shape=rectangle style=filled]
+	N9 [label="Wall Treatment Selection" color="#7E57C2" fillcolor="#D1C4E9" shape=multipledocuments style=filled]
+	N10 [label="Universal Design Principles" color="#7E57C2" fillcolor="#D1C4E9" shape=document style=filled]
+	N11 [label="Budget Management" color="#7986CB" fillcolor="#E8EAF6" shape=preparation style=filled]
+	N12 [label="Construction Documentation" color="#7E57C2" fillcolor="#D1C4E9" shape=vnode_shape style=filled]
+	N13 [label="Bathroom Design" color="#7986CB" fillcolor="#E8EAF6" shape=ellipse style=filled]
+	S1 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Ventilation Planning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Ventilation Planning"
+		nest0_0 [label="Acoustic Treatment" color="#FF9800" fillcolor="#FFE0B2" shape=vnode_shape style=filled]
+		nest0_1 [label="Sustainable Design Practices" color="#FF9800" fillcolor="#FFE0B2" shape=ellipse style=filled]
+		nest0_2 [label="Space Planning" color="#FF9800" fillcolor="#FFE0B2" shape=ellipse style=filled]
+	}
+	subgraph cluster_Retail Interior Design {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Retail Interior Design"
+		nest1_0 [label="Furniture Selection" color="#7986CB" fillcolor="#E8EAF6" shape=diamond style=filled]
+		nest1_1 [label="CAD Drafting" color="#FF9800" fillcolor="#FFE0B2" shape=hexagon style=filled]
+		nest1_2 [label="3D Rendering" color="#FF9800" fillcolor="#FFE0B2" shape=database style=filled]
+		nest1_3 [label="Site Measurement" color="#7986CB" fillcolor="#E8EAF6" shape=document style=filled]
+	}
+	N0 -> N1 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed label="styles" dir=forward]
+	N2 -> N3 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#7986CB" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#7986CB" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest0_0 [color="#7986CB" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> nest1_3 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N11 -> nest1_0 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	nest1_3 -> N2 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N8 -> S1 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N12 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	S1 -> N13 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N5 [color="#7986CB" penwidth=1.5 style=solid label="lights" dir=forward]
+	N1 -> nest1_3 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N1 -> nest1_1 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N8 -> N7 [color="#000000" penwidth=1.5 style=solid label="spaces" dir=forward]
+	nest0_0 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N12 [color="#7986CB" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_263.txt

@@ -0,0 +1,33 @@
+<API Integration for Translation Services, connectedTo, Contextual Understanding>
+<Contextual Understanding, connectedTo, Machine Translation Engine>
+<Continuous Learning Models for Translation, connectedTo, Custom Vocabulary Integration>
+<Continuous Learning Models for Translation, connectedTo, Medical Translation>
+<Continuous Learning Models for Translation, connectedTo, Speech Recognition>
+<Continuous Learning Models for Translation, learns, Contextual Understanding>
+<Continuous Learning Models for Translation, tracks, Statistical Machine Translation>
+<Cross_Lingual Communication, connectedTo, Subtitling Generation>
+<Custom Vocabulary Integration, connectedTo, Medical Translation>
+<Customer Support Translation, connectedTo, Voice Biometrics>
+<Low_Latency Processing, connectedTo, Data Security for Translated Content>
+<Machine Translation Engine, connectedTo, Meeting Translation Systems>
+<Machine Translation Engine, connectedTo, Statistical Machine Translation>
+<Medical Translation, connectedTo, Text_to_Speech Synthesis>
+<Meeting Translation Systems, connectedTo, Statistical Machine Translation>
+<Neural Machine Translation, connectedTo, Text_to_Speech Synthesis>
+<Noise Reduction for Speech Input, connectedTo, Neural Machine Translation>
+<Real_Time Document Translation, connectedTo, Cross_Lingual Communication>
+<Social Media Translation, connectedTo, Real_Time Document Translation>
+<Speech Recognition, connectedTo, API Integration for Translation Services>
+<Speech Recognition, supports, Wearable Translation Devices>
+<Statistical Machine Translation, connectedTo, Low_Latency Processing>
+<Subtitling Generation, connectedTo, API Integration for Translation Services>
+<Subtitling Generation, connectedTo, Contextual Understanding>
+<Subtitling Generation, connectedTo, Low_Latency Processing>
+<Subtitling Generation, connectedTo, Speech Recognition>
+<Subtitling Generation, connectedTo, Statistical Machine Translation>
+<Subtitling Generation, connects, Meeting Translation Systems>
+<Text_to_Speech Synthesis, connectedTo, Customer Support Translation>
+<Text_to_Speech Synthesis, connectedTo, Statistical Machine Translation>
+<Text_to_Speech Synthesis, connectedTo, Subtitling Generation>
+<Voice Biometrics, connectedTo, Noise Reduction for Speech Input>
+<Wearable Translation Devices, connectedTo, Social Media Translation>

test/diagrams/graph_hard/diagrams_265.dot

@@ -0,0 +1,53 @@
+digraph {
+	rankdir=RL
+	N0 [label="Counter_Drone Systems" color="#FF9800" fillcolor="#FFE0B2" shape=parallelogram style=filled]
+	N1 [label="Videography" color="#8C9EFF" fillcolor="#D3D7EB" shape=rectangle style=filled]
+	N2 [label="Flight Planning Software" color="#8C9EFF" fillcolor="#D3D7EB" shape=rect style=filled]
+	N3 [label="Drone Regulations Compliance" color="#BDAFA8" fillcolor="#E4E0DF" shape=rectangle style=filled]
+	N4 [label="Remote Piloting Training" color="#8C9EFF" fillcolor="#D3D7EB" shape=ellipse style=filled]
+	N5 [label="Delivery Services" color="#8C9EFF" fillcolor="#D3D7EB" shape=vnode_shape style=filled]
+	N6 [label="Swarm Robotics for Drones" color="#FF9800" fillcolor="#FFE0B2" shape=rectangle style=filled]
+	N7 [label="Ground Control Station Development" color="#FF9800" fillcolor="#FFE0B2" shape=action style=filled]
+	N8 [label="Geofencing Implementation" color="#FF9800" fillcolor="#FFE0B2" shape=inputoutput style=filled]
+	N9 [label="Propulsion System Development" color="#BDAFA8" fillcolor="#E4E0DF" shape=diamond style=filled]
+	N10 [label="Inspection" color="#8C9EFF" fillcolor="#D3D7EB" shape=rectangle style=filled]
+	subgraph cluster_Battery Management System {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Battery Management System"
+		nest0_0 [label="Wildlife Tracking" color="#BDAFA8" fillcolor="#E4E0DF" shape=action style=filled]
+		nest0_1 [label="Flight Control System" color="#8C9EFF" fillcolor="#D3D7EB" shape=diamond style=filled]
+	}
+	subgraph cluster_Autonomous Flight {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Autonomous Flight"
+		nest1_0 [label="Navigation System" color="#BDAFA8" fillcolor="#E4E0DF" shape=vnode_shape style=filled]
+		nest1_1 [label="Urban Air Mobility Planning" color="#8C9EFF" fillcolor="#D3D7EB" shape=diamond style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#BDAFA8" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N10 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest1_0 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> nest1_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N5 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N7 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed label="receives" dir=forward]
+	N3 -> N1 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N6 -> nest1_0 [color="#BDAFA8" penwidth=1.5 style=dashed label="automates" dir=forward]
+	N4 -> N6 [color="#8C9EFF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest0_1 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N8 -> N7 [color="#BDAFA8" penwidth=1.5 style=solid label="analyzes" dir=forward]
+	N10 -> N3 [color="#000000" penwidth=1.5 style=solid label="trains" dir=forward]
+}

test/diagrams/graph_hard/diagrams_265.txt

@@ -0,0 +1,25 @@
+<Counter_Drone Systems, connectedTo, Videography>
+<Delivery Services, connectedTo, Swarm Robotics for Drones>
+<Drone Regulations Compliance, connectedTo, Remote Piloting Training>
+<Drone Regulations Compliance, connectedTo, Videography>
+<Flight Control System, connectedTo, Inspection>
+<Flight Planning Software, connectedTo, Delivery Services>
+<Flight Planning Software, connectedTo, Drone Regulations Compliance>
+<Flight Planning Software, connectedTo, Wildlife Tracking>
+<Geofencing Implementation, analyzes, Ground Control Station Development>
+<Geofencing Implementation, connectedTo, Propulsion System Development>
+<Ground Control Station Development, connectedTo, Geofencing Implementation>
+<Ground Control Station Development, receives, Urban Air Mobility Planning>
+<Inspection, trains, Drone Regulations Compliance>
+<Navigation System, connectedTo, Urban Air Mobility Planning>
+<Propulsion System Development, connectedTo, Inspection>
+<Propulsion System Development, connectedTo, Navigation System>
+<Remote Piloting Training, connectedTo, Delivery Services>
+<Remote Piloting Training, connectedTo, Swarm Robotics for Drones>
+<Swarm Robotics for Drones, automates, Navigation System>
+<Swarm Robotics for Drones, connectedTo, Ground Control Station Development>
+<Urban Air Mobility Planning, connectedTo, Ground Control Station Development>
+<Videography, connectedTo, Flight Control System>
+<Videography, connectedTo, Flight Planning Software>
+<Videography, connectedTo, Navigation System>
+<Wildlife Tracking, connectedTo, Flight Control System>

test/diagrams/graph_hard/diagrams_266.txt

@@ -0,0 +1,35 @@
+<3D Modeling from Drone Data, connectedTo, Swarm Robotics for Drones>
+<Aerial Photography, connectedTo, Collision Avoidance Systems>
+<Aerial Photography, connectedTo, Drone Data Security>
+<Battery Management System, connectedTo, Payload Customization>
+<Collision Avoidance Systems, connectedTo, Mapping and Surveying>
+<Collision Avoidance Systems, connectedTo, Propeller Design>
+<Counter_Drone Systems, analyzes, Remote Piloting Training>
+<Drone Data Security, connectedTo, Drone Regulations Compliance>
+<Drone Maintenance, connectedTo, Flight Planning Software>
+<Drone Regulations Compliance, connectedTo, Battery Management System>
+<Drone Regulations Compliance, connectedTo, Propeller Design>
+<Drone Regulations Compliance, connectedTo, Remote Piloting Training>
+<Environmental Monitoring, connectedTo, Counter_Drone Systems>
+<Environmental Monitoring, connectedTo, Ground Control Station Development>
+<Flight Control System, connectedTo, Flight Planning Software>
+<Flight Planning Software, connectedTo, Propeller Design>
+<Flight Planning Software, navigates, 3D Modeling from Drone Data>
+<Geofencing Implementation, connectedTo, Propeller Design>
+<Ground Control Station Development, connectedTo, Payload Integration>
+<Mapping and Surveying, connectedTo, Geofencing Implementation>
+<Navigation System, connectedTo, Aerial Photography>
+<Navigation System, connectedTo, Collision Avoidance Systems>
+<Payload Customization, connectedTo, Collision Avoidance Systems>
+<Payload Customization, connectedTo, Environmental Monitoring>
+<Payload Integration, connectedTo, Flight Control System>
+<Propulsion System Development, educates, Collision Avoidance Systems>
+<Remote Piloting Training, connectedTo, Collision Avoidance Systems>
+<Remote Piloting Training, connectedTo, Mapping and Surveying>
+<Remote Piloting Training, connectedTo, Propulsion System Development>
+<Search and Rescue Operations, connectedTo, Wildlife Tracking>
+<Swarm Robotics for Drones, connectedTo, Search and Rescue Operations>
+<Swarm Robotics for Drones, monitors, Urban Air Mobility Planning>
+<Urban Air Mobility Planning, connectedTo, Navigation System>
+<Videography, connectedTo, Drone Maintenance>
+<Wildlife Tracking, connectedTo, Flight Planning Software>

test/diagrams/graph_hard/diagrams_268.txt

@@ -0,0 +1,32 @@
+<Adaptive Cruise Control, connectedTo, Hardware Design>
+<Adaptive Cruise Control, connectedTo, Vehicle Diagnostics>
+<Automatic Emergency Braking, connectedTo, Vehicle Diagnostics>
+<Battery Management for EVs, connectedTo, Cloud Connectivity for AVs>
+<Charging Infrastructure, connectedTo, Battery Management for EVs>
+<Charging Infrastructure, connectedTo, Redundancy in Sensors>
+<Cloud Connectivity for AVs, connectedTo, Perception System>
+<Data Collection and Annotation, connectedTo, Perception System>
+<Decision_Making Algorithms, connectedTo, Insurance Models for AVs>
+<Decision_Making Algorithms, connectedTo, Over_the_Air Updates>
+<Decision_Making Algorithms, connectedTo, Vehicle Diagnostics>
+<Decision_Making Algorithms, optimizes, Automatic Emergency Braking>
+<Driver Monitoring Systems, connectedTo, Predictive Maintenance>
+<Fleet Management, connectedTo, Driver Monitoring Systems>
+<Hardware Design, connectedTo, Pedestrian Detection>
+<Hardware Design, connectedTo, Simulation and Testing>
+<Hardware Design, connectedTo, Vehicle Diagnostics>
+<Insurance Models for AVs, connectedTo, Over_the_Air Updates>
+<Motion Control, connectedTo, Charging Infrastructure>
+<Pedestrian Detection, connectedTo, Motion Control>
+<Pedestrian Detection, connectedTo, Vehicle Diagnostics>
+<Perception System, connectedTo, Decision_Making Algorithms>
+<Predictive Maintenance, connectedTo, Redundancy in Sensors>
+<Redundancy in Sensors, connectedTo, Battery Management for EVs>
+<Redundancy in Sensors, connectedTo, Cloud Connectivity for AVs>
+<Redundancy in Sensors, connectedTo, Decision_Making Algorithms>
+<Redundancy in Sensors, connectedTo, Remote Operation Capability>
+<Remote Operation Capability, connectedTo, Battery Management for EVs>
+<Simulation and Testing, connectedTo, Fleet Management>
+<Traffic Sign Recognition, connectedTo, Data Collection and Annotation>
+<Vehicle Diagnostics, connectedTo, Traffic Sign Recognition>
+<Vehicle Diagnostics, designs, Insurance Models for AVs>

test/diagrams/graph_hard/diagrams_270.txt

@@ -0,0 +1,32 @@
+<Accident Reconstruction for AVs, connectedTo, Adaptive Cruise Control>
+<Accident Reconstruction for AVs, connectedTo, Decision_Making Algorithms>
+<Accident Reconstruction for AVs, connectedTo, Object Detection and Classification>
+<Adaptive Cruise Control, connectedTo, Cloud Connectivity for AVs>
+<Adaptive Cruise Control, connectedTo, Human_Machine Interface>
+<Adaptive Cruise Control, maps, Regulatory Compliance>
+<Automatic Emergency Braking, connectedTo, Object Detection and Classification>
+<Automatic Emergency Braking, connectedTo, Remote Operation Capability>
+<Automatic Emergency Braking, transports, Adaptive Cruise Control>
+<Cloud Connectivity for AVs, connectedTo, Regulatory Compliance>
+<Data Collection and Annotation, connectedTo, Sensor Integration>
+<Decision_Making Algorithms, diagnoses, Driver Monitoring Systems>
+<Driver Monitoring Systems, connectedTo, Traffic Sign Recognition>
+<Ethical Decision_Making, connectedTo, Data Collection and Annotation>
+<Hardware Design, connectedTo, Cloud Connectivity for AVs>
+<Object Detection and Classification, connectedTo, Adaptive Cruise Control>
+<Over_the_Air Updates, connectedTo, Accident Reconstruction for AVs>
+<Over_the_Air Updates, connectedTo, Automatic Emergency Braking>
+<Over_the_Air Updates, connectedTo, Cloud Connectivity for AVs>
+<Over_the_Air Updates, connectedTo, Human_Machine Interface>
+<Pedestrian Detection, connectedTo, Adaptive Cruise Control>
+<Pedestrian Detection, connectedTo, Object Detection and Classification>
+<Pedestrian Detection, plans, Public Acceptance and Trust>
+<Public Acceptance and Trust, connectedTo, Over_the_Air Updates>
+<Regulatory Compliance, connectedTo, Ethical Decision_Making>
+<Regulatory Compliance, connectedTo, Human_Machine Interface>
+<Remote Operation Capability, connectedTo, Accident Reconstruction for AVs>
+<Remote Operation Capability, connectedTo, Adaptive Cruise Control>
+<Remote Operation Capability, connectedTo, Object Detection and Classification>
+<Sensor Integration, connectedTo, Hardware Design>
+<Traffic Sign Recognition, connectedTo, Vehicle Diagnostics>
+<Vehicle Diagnostics, connectedTo, Cloud Connectivity for AVs>

test/diagrams/graph_hard/diagrams_273.txt

@@ -0,0 +1,35 @@
+<Bike_sharing Services, connectedTo, Car_sharing Services>
+<Bike_sharing Services, connectedTo, Route Optimization>
+<Bike_sharing Services, connectedTo, User Registration>
+<Car_sharing Services, connectedTo, Passenger Safety Protocols>
+<Charging or Refueling Logistics, connectedTo, Bike_sharing Services>
+<Charging or Refueling Logistics, connectedTo, Micro_mobility Management>
+<Charging or Refueling Logistics, connectedTo, User Onboarding>
+<Customer Support, connectedTo, Geofencing for Operations>
+<Customer Support, verifies, Charging or Refueling Logistics>
+<Data Analytics for Usage Patterns, connectedTo, Micro_mobility Management>
+<Driver Management, connectedTo, Charging or Refueling Logistics>
+<Dynamic Pricing, connectedTo, Bike_sharing Services>
+<Dynamic Pricing, connectedTo, Charging or Refueling Logistics>
+<Dynamic Pricing, connectedTo, Driver Management>
+<Geofencing for Operations, connectedTo, Charging or Refueling Logistics>
+<Geofencing for Operations, connectedTo, Payment Processing>
+<Micro_mobility Management, connectedTo, Bike_sharing Services>
+<Micro_mobility Management, connectedTo, Route Optimization>
+<Parking Integration, connectedTo, Customer Support>
+<Parking Integration, connectedTo, Route Optimization>
+<Parking Integration, connectedTo, Sustainability Initiatives>
+<Payment Processing, connectedTo, Dynamic Pricing>
+<Payment Processing, connectedTo, Route Optimization>
+<Regulatory Compliance, connectedTo, Data Analytics for Usage Patterns>
+<Route Optimization, connectedTo, Car_sharing Services>
+<Smart City Integration, connectedTo, Driver Management>
+<Sustainability Initiatives, connectedTo, Vehicle Booking>
+<Ticketing and Fare Collection, connectedTo, Charging or Refueling Logistics>
+<Ticketing and Fare Collection, connectedTo, Geofencing for Operations>
+<Ticketing and Fare Collection, connectedTo, Parking Integration>
+<Ticketing and Fare Collection, connectedTo, Passenger Safety Protocols>
+<Ticketing and Fare Collection, connectedTo, Route Optimization>
+<User Onboarding, connectedTo, Smart City Integration>
+<User Registration, connectedTo, Route Optimization>
+<Vehicle Booking, connectedTo, Regulatory Compliance>

test/diagrams/graph_hard/diagrams_275.dot

@@ -0,0 +1,63 @@
+digraph {
+	rankdir=TB
+	N0 [label="License Plate Recognition" color="#AB47BC" fillcolor="#F3E5F5" shape=preparation style=filled]
+	N1 [label="Maintenance of Systems" color="#A1887F" fillcolor="#EFEBE9" shape=box style=filled]
+	N2 [label="Navigation to Open Space" color="#AB47BC" fillcolor="#F3E5F5" shape=hexagon style=filled]
+	N3 [label="Real_Time Information Display" color="#4FC3F7" fillcolor="#E1F5FE" shape=rect style=filled]
+	N4 [label="Space Detection" color="#4FC3F7" fillcolor="#E1F5FE" shape=inputoutput style=filled]
+	N5 [label="On_Street Parking Management" color="#A1887F" fillcolor="#EFEBE9" shape=hexagon style=filled]
+	N6 [label="Emergency Vehicle Access Management" color="#A1887F" fillcolor="#EFEBE9" shape=rectangle style=filled]
+	N7 [label="Cloud_based Parking Platforms" color="#AB47BC" fillcolor="#F3E5F5" shape=action style=filled]
+	N8 [label="Environmental Impact Monitoring" color="#4FC3F7" fillcolor="#E1F5FE" shape=box style=filled]
+	S0 [label="" color="#AB47BC" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#A1887F" fillcolor="#EFEBE9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#AB47BC" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Billing and Reconciliation {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Billing and Reconciliation"
+		nest0_0 [label="Violation Detection" color="#4FC3F7" fillcolor="#E1F5FE" shape=document style=filled]
+		nest0_1 [label="IoT Sensors for Parking" color="#A1887F" fillcolor="#EFEBE9" shape=hexagon style=filled]
+		nest0_2 [label="User Experience Design for Apps" color="#A1887F" fillcolor="#EFEBE9" shape=vnode_shape style=filled]
+		nest0_3 [label="Data Analytics for Parking Usage" color="#A1887F" fillcolor="#EFEBE9" shape=parallelogram style=filled]
+	}
+	subgraph cluster_Mobile Parking Apps {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Mobile Parking Apps"
+		nest1_0 [label="Demand Forecasting" color="#A1887F" fillcolor="#EFEBE9" shape=preparation style=filled]
+		nest1_1 [label="Enforcement and Fines Management" color="#4FC3F7" fillcolor="#E1F5FE" shape=rect style=filled]
+		nest1_2 [label="Permit Management" color="#4FC3F7" fillcolor="#E1F5FE" shape=database style=filled]
+	}
+	N0 -> N1 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed label="communicates" dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> nest0_3 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest0_0 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	nest0_3 -> N7 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest1_0 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> S0 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	S0 -> N6 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N0 -> S1 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N3 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	S1 -> N6 [color="#AB47BC" penwidth=1.5 style=solid label="licenses" dir=forward]
+	S1 -> N4 [color="#A1887F" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N3 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> M2 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	M2 -> N5 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_275.txt

@@ -0,0 +1,25 @@
+<Cloud_based Parking Platforms, connectedTo, Environmental Impact Monitoring>
+<Data Analytics for Parking Usage, connectedTo, Cloud_based Parking Platforms>
+<Demand Forecasting, connectedTo, Enforcement and Fines Management>
+<Emergency Vehicle Access Management, connectedTo, Cloud_based Parking Platforms>
+<Enforcement and Fines Management, connectedTo, Permit Management>
+<IoT Sensors for Parking, connectedTo, User Experience Design for Apps>
+<License Plate Recognition, connectedTo, Maintenance of Systems>
+<License Plate Recognition, connectedTo, On_Street Parking Management>
+<License Plate Recognition, connectedTo, Real_Time Information Display>
+<License Plate Recognition, connectedTo, Space Detection>
+<License Plate Recognition, licenses, Emergency Vehicle Access Management>
+<Maintenance of Systems, connectedTo, Navigation to Open Space>
+<Maintenance of Systems, connectedTo, Real_Time Information Display>
+<Navigation to Open Space, connectedTo, Emergency Vehicle Access Management>
+<Navigation to Open Space, connectedTo, Environmental Impact Monitoring>
+<Navigation to Open Space, connectedTo, On_Street Parking Management>
+<Navigation to Open Space, connectedTo, Real_Time Information Display>
+<On_Street Parking Management, connectedTo, Emergency Vehicle Access Management>
+<On_Street Parking Management, connectedTo, Violation Detection>
+<Permit Management, connectedTo, Navigation to Open Space>
+<Real_Time Information Display, connectedTo, Demand Forecasting>
+<Real_Time Information Display, connectedTo, Space Detection>
+<Space Detection, connectedTo, On_Street Parking Management>
+<User Experience Design for Apps, connectedTo, Data Analytics for Parking Usage>
+<Violation Detection, communicates, IoT Sensors for Parking>

test/diagrams/graph_hard/diagrams_28.dot

@@ -0,0 +1,60 @@
+digraph {
+	rankdir=BT
+	N0 [label="Payment Received" color="#80DDEA" fillcolor="#D3F7F9" shape=multipledocuments style=filled]
+	N1 [label="MMS Transmission" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+	N2 [label="Device Setup" color="#FFD54F" fillcolor="#FFF8E1" shape=document style=filled]
+	N3 [label="Mobile Top_up" color="#80DDEA" fillcolor="#D3F7F9" shape=vnode_shape style=filled]
+	N4 [label="Service Activation Request" color="#FFD54F" fillcolor="#FFF8E1" shape=diamond style=filled]
+	N5 [label="Base Station Installation" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	N6 [label="Service Complaint" color="#FF9800" fillcolor="#FFE0B2" shape=hexagon style=filled]
+	N7 [label="Billing Inquiry" color="#80DDEA" fillcolor="#D3F7F9" shape=rectangle style=filled]
+	N8 [label="Plan Renewal" color="#80DDEA" fillcolor="#D3F7F9" shape=predefinedprocess style=filled]
+	N9 [label="Data Usage Logging" color="#80DDEA" fillcolor="#D3F7F9" shape=parallelogram style=filled]
+	N10 [label="Issue Resolution" color="#FF9800" fillcolor="#FFE0B2" shape=inputoutput style=filled]
+	S1 [label="" color="#80DDEA" fillcolor="#D3F7F9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFD54F" fillcolor="#FFF8E1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Network Security Monitoring {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Network Security Monitoring"
+		nest0_0 [label="Troubleshooting Guide" color="#FFD54F" fillcolor="#FFF8E1" shape=document style=filled]
+		nest0_1 [label="Bandwidth Allocation" color="#80DDEA" fillcolor="#D3F7F9" shape=preparation style=filled]
+		nest0_2 [label="Service Level Agreement" color="#FFD54F" fillcolor="#FFF8E1" shape=predefinedprocess style=filled]
+	}
+	subgraph cluster_SIM Registration {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="SIM Registration"
+		nest1_0 [label="Contract Termination" color="#FF9800" fillcolor="#FFE0B2" shape=predefinedprocess style=filled]
+		nest1_1 [label="Network Activation" color="#FF9800" fillcolor="#FFE0B2" shape=database style=filled]
+		nest1_2 [label="Antenna Maintenance" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	}
+	N0 -> N1 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FF9800" penwidth=1.5 style=dashed label="activates" dir=forward]
+	N4 -> N5 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest0_0 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N4 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest1_0 [color="#FFD54F" penwidth=1.5 style=solid label="resolves" dir=forward]
+	nest1_2 -> N5 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S1 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N9 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> M1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	M1 -> N9 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N9 -> nest1_2 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N2 -> N9 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N9 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_28.txt

@@ -0,0 +1,26 @@
+<Antenna Maintenance, connectedTo, Base Station Installation>
+<Bandwidth Allocation, connectedTo, Service Level Agreement>
+<Base Station Installation, connectedTo, Service Complaint>
+<Billing Inquiry, connectedTo, Data Usage Logging>
+<Billing Inquiry, connectedTo, Issue Resolution>
+<Billing Inquiry, connectedTo, Plan Renewal>
+<Contract Termination, connectedTo, Network Activation>
+<Data Usage Logging, connectedTo, Antenna Maintenance>
+<Data Usage Logging, connectedTo, Billing Inquiry>
+<Data Usage Logging, connectedTo, Issue Resolution>
+<Data Usage Logging, resolves, Contract Termination>
+<Device Setup, connectedTo, Data Usage Logging>
+<Device Setup, connectedTo, Mobile Top_up>
+<MMS Transmission, connectedTo, Data Usage Logging>
+<MMS Transmission, connectedTo, Device Setup>
+<Mobile Top_up, activates, Service Activation Request>
+<Mobile Top_up, connectedTo, Troubleshooting Guide>
+<Network Activation, connectedTo, Antenna Maintenance>
+<Payment Received, connectedTo, MMS Transmission>
+<Plan Renewal, connectedTo, Data Usage Logging>
+<Service Activation Request, connectedTo, Base Station Installation>
+<Service Activation Request, connectedTo, Data Usage Logging>
+<Service Complaint, connectedTo, Billing Inquiry>
+<Service Complaint, connectedTo, Data Usage Logging>
+<Service Level Agreement, connectedTo, Service Activation Request>
+<Troubleshooting Guide, connectedTo, Bandwidth Allocation>

test/diagrams/graph_hard/diagrams_280.dot

@@ -0,0 +1,75 @@
+digraph {
+	rankdir=BT
+	N0 [label="Blockchain for Voting" color="#BCB88A" fillcolor="#F5F5DC" shape=parallelogram style=filled]
+	N1 [label="Threat Modeling" color="#AABEC6" fillcolor="#E0E6E9" shape=preparation style=filled]
+	N2 [label="Optical Scan Systems" color="#AABEC6" fillcolor="#E0E6E9" shape=diamond style=filled]
+	N3 [label="Transparency" color="#AABEC6" fillcolor="#E0E6E9" shape=box style=filled]
+	N4 [label="Cybersecurity for Voting Systems" color="#BCB88A" fillcolor="#F5F5DC" shape=rect style=filled]
+	N5 [label="Election Official Training" color="#FFC107" fillcolor="#FFECB3" shape=document style=filled]
+	N6 [label="Direct Recording Electronic Systems" color="#FFC107" fillcolor="#FFECB3" shape=rectangle style=filled]
+	N7 [label="Auditability" color="#AABEC6" fillcolor="#E0E6E9" shape=rectangle style=filled]
+	N8 [label="Remote Voting Solutions" color="#AABEC6" fillcolor="#E0E6E9" shape=inputoutput style=filled]
+	N9 [label="Accessibility Features" color="#FFC107" fillcolor="#FFECB3" shape=action style=filled]
+	N10 [label="Hardware Tamper Detection" color="#BCB88A" fillcolor="#F5F5DC" shape=rectangle style=filled]
+	N11 [label="Legal Framework Compliance" color="#FFC107" fillcolor="#FFECB3" shape=hexagon style=filled]
+	N12 [label="System Certification" color="#FFC107" fillcolor="#FFECB3" shape=parallelogram style=filled]
+	N13 [label="Voter Privacy Protection" color="#BCB88A" fillcolor="#F5F5DC" shape=box style=filled]
+	N14 [label="Post_Election Audits" color="#AABEC6" fillcolor="#E0E6E9" shape=document style=filled]
+	N15 [label="Voting Machine Design" color="#AABEC6" fillcolor="#E0E6E9" shape=multipledocuments style=filled]
+	N16 [label="Results Aggregation" color="#FFC107" fillcolor="#FFECB3" shape=diamond style=filled]
+	S0 [label="" color="#BCB88A" fillcolor="#F5F5DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#AABEC6" fillcolor="#E0E6E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFC107" fillcolor="#FFECB3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Risk Management for Elections {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Risk Management for Elections"
+		nest0_0 [label="Voter Authentication" color="#AABEC6" fillcolor="#E0E6E9" shape=rectangle style=filled]
+		nest0_1 [label="Undue Influence Prevention" color="#BCB88A" fillcolor="#F5F5DC" shape=database style=filled]
+		nest0_2 [label="Voter Registration" color="#FFC107" fillcolor="#FFECB3" shape=parallelogram style=filled]
+		nest0_3 [label="Cryptographic Security" color="#FFC107" fillcolor="#FFECB3" shape=action style=filled]
+	}
+	subgraph cluster_Online Voting Systems {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Online Voting Systems"
+		nest1_0 [label="Zero_Knowledge Proofs for Privacy" color="#FFC107" fillcolor="#FFECB3" shape=rectangle style=filled]
+		nest1_1 [label="Vote Counting" color="#AABEC6" fillcolor="#E0E6E9" shape=inputoutput style=filled]
+		nest1_2 [label="Voter Education Programs" color="#BCB88A" fillcolor="#F5F5DC" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N15 -> N16 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest0_0 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	nest0_3 -> N2 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N10 -> nest1_0 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N6 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S0 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	S0 -> N14 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N13 -> S1 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	S1 -> N15 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N16 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#AABEC6" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M1 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	M1 -> N16 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_295.txt

@@ -0,0 +1,39 @@
+<Augmented Reality Experiences, connectedTo, Visitor Flow Analysis>
+<Collection Digitization, connectedTo, Digital Storytelling>
+<Community Engagement Platforms, connectedTo, RFID for Object Tracking>
+<Crowdsourcing for Collections, connectedTo, Conservation Technology>
+<Cybersecurity for Museum Data, connectedTo, Crowdsourcing for Collections>
+<Database Management, connectedTo, Conservation Technology>
+<Database Management, connectedTo, Interactive Kiosks>
+<Database Management, exhibits, Cybersecurity for Museum Data>
+<Digital Signage, connectedTo, Cybersecurity for Museum Data>
+<Digital Signage, connectedTo, Digital Storytelling>
+<Digital Storytelling, connectedTo, Conservation Technology>
+<Digital Storytelling, connectedTo, Crowdsourcing for Collections>
+<Digital Storytelling, connectedTo, Cybersecurity for Museum Data>
+<Digital Storytelling, connectedTo, Wayfinding Systems>
+<Educational Technology Integration, connectedTo, Augmented Reality Experiences>
+<Gamification of Museum Experiences, connectedTo, Ticketing and Visitor Systems>
+<Interactive Kiosks, connectedTo, Research Databases Access>
+<Member Management Systems, connectedTo, Cybersecurity for Museum Data>
+<Member Management Systems, connectedTo, Digital Signage>
+<Predictive Maintenance for Tech, connectedTo, Virtual Reality Experiences>
+<RFID for Object Tracking, connectedTo, Soundscape Design>
+<RFID for Object Tracking, connectedTo, User Experience Design>
+<Research Databases Access, connectedTo, Gamification of Museum Experiences>
+<Soundscape Design, connectedTo, Conservation Technology>
+<Soundscape Design, maintains, Educational Technology Integration>
+<Soundscape Design, personalizes, Predictive Maintenance for Tech>
+<Ticketing and Visitor Systems, analyzes, Member Management Systems>
+<Ticketing and Visitor Systems, connectedTo, Cybersecurity for Museum Data>
+<User Experience Design, connectedTo, Visitor Analytics>
+<Virtual Reality Experiences, connectedTo, Conservation Technology>
+<Virtual Reality Experiences, connectedTo, Crowdsourcing for Collections>
+<Virtual Reality Experiences, connectedTo, Digital Storytelling>
+<Virtual Reality Experiences, connectedTo, Interactive Kiosks>
+<Virtual Reality Experiences, connectedTo, Wayfinding Systems>
+<Virtual Reality Experiences, tracks, Database Management>
+<Visitor Analytics, connectedTo, Gamification of Museum Experiences>
+<Visitor Flow Analysis, connectedTo, Collection Digitization>
+<Wayfinding Systems, connectedTo, Conservation Technology>
+<Wayfinding Systems, connectedTo, Cybersecurity for Museum Data>

test/diagrams/graph_hard/diagrams_301.txt

@@ -0,0 +1,27 @@
+<Cold Case Review, connectedTo, Courtroom Presentation>
+<Courtroom Presentation, connectedTo, Document Examination>
+<Data Recovery, connectedTo, Forensic Psychology>
+<Data Recovery, connectedTo, Handwriting Analysis>
+<Data Recovery, investigates, Forensic Photography>
+<Document Examination, connectedTo, Expert Witness Testimony>
+<Expert Witness Testimony, connectedTo, Forensic Botany>
+<Expert Witness Testimony, connectedTo, Forensic Photography>
+<Expert Witness Testimony, connectedTo, Handwriting Analysis>
+<Expert Witness Testimony, connectedTo, Toxicology Testing>
+<Expert Witness Testimony, connectedTo, Voice Recognition>
+<Fingerprint Analysis, connectedTo, Chain of Custody Management>
+<Forensic Botany, connectedTo, Chain of Custody Management>
+<Forensic Entomology, connectedTo, Cold Case Review>
+<Forensic Photography, connectedTo, Voice Recognition>
+<Forensic Psychology, connectedTo, Expert Witness Testimony>
+<Forensic Psychology, connectedTo, Forensic Entomology>
+<Forensic Psychology, connectedTo, Forensic Photography>
+<Handwriting Analysis, autopsies, Voice Recognition>
+<Handwriting Analysis, connectedTo, Forensic Photography>
+<Handwriting Analysis, connectedTo, Toolmark Analysis>
+<Handwriting Analysis, examines, Forensic Botany>
+<Handwriting Analysis, researches, Chain of Custody Management>
+<Toolmark Analysis, connectedTo, Fingerprint Analysis>
+<Toxicology Testing, connectedTo, Forensic Photography>
+<Toxicology Testing, connectedTo, Handwriting Analysis>
+<Voice Recognition, connectedTo, Forensic Botany>

test/diagrams/graph_hard/diagrams_303.txt

@@ -0,0 +1,33 @@
+<Arson Investigation, connectedTo, Fingerprint Analysis>
+<Ballistics Analysis, connectedTo, Forensic Accounting>
+<Bloodstain Pattern Analysis, connectedTo, Ballistics Analysis>
+<Chain of Custody Management, connectedTo, Forensic Botany>
+<Crime Database Search, connectedTo, Cyber Crime Investigation>
+<Crime Database Search, connectedTo, Document Examination>
+<Crime Database Search, connectedTo, Forensic Psychology>
+<Cyber Crime Investigation, connectedTo, Legal Standards Compliance>
+<Digital Forensics, connectedTo, Cyber Crime Investigation>
+<Digital Forensics, connectedTo, Document Examination>
+<Digital Forensics, connectedTo, Expert Witness Testimony>
+<Digital Forensics, connectedTo, Laboratory Analysis>
+<Document Examination, connectedTo, Chain of Custody Management>
+<Expert Witness Testimony, connectedTo, Fingerprint Analysis>
+<Fingerprint Analysis, connectedTo, Chain of Custody Management>
+<Fingerprint Analysis, connectedTo, Crime Database Search>
+<Fingerprint Analysis, connectedTo, Document Examination>
+<Fingerprint Analysis, connectedTo, Forensic Botany>
+<Fingerprint Analysis, connectedTo, Legal Standards Compliance>
+<Forensic Accounting, connectedTo, Mobile Device Forensics>
+<Forensic Botany, connectedTo, Forensic Entomology>
+<Forensic Botany, connectedTo, Legal Standards Compliance>
+<Forensic Botany, connectedTo, Malware Analysis>
+<Forensic Psychology, connectedTo, Toxicology Testing>
+<Laboratory Analysis, connectedTo, Expert Witness Testimony>
+<Legal Standards Compliance, connectedTo, Forensic Entomology>
+<Malware Analysis, connectedTo, Bloodstain Pattern Analysis>
+<Malware Analysis, connectedTo, Cyber Crime Investigation>
+<Mobile Device Forensics, connectedTo, Laboratory Analysis>
+<Network Forensics, connectedTo, Digital Forensics>
+<Network Forensics, connectedTo, Expert Witness Testimony>
+<Toxicology Testing, connectedTo, Vehicle Forensics>
+<Vehicle Forensics, connectedTo, Arson Investigation>

test/diagrams/graph_hard/diagrams_313.dot

@@ -0,0 +1,78 @@
+digraph {
+	rankdir=RL
+	N0 [label="Freshwater Conservation" color="#7E57C2" fillcolor="#D1C4E9" shape=box style=filled]
+	N1 [label="Grassland Conservation" color="#A188D0" fillcolor="#DACBE3" shape=multipledocuments style=filled]
+	N2 [label="Law Enforcement" color="#7E57C2" fillcolor="#D1C4E9" shape=rectangle style=filled]
+	N3 [label="Ecological Survey" color="#FFC107" fillcolor="#FFECB3" shape=ellipse style=filled]
+	N4 [label="Anti_Poaching Operations" color="#7E57C2" fillcolor="#D1C4E9" shape=rectangle style=filled]
+	N5 [label="Satellite Tracking of Animals" color="#7E57C2" fillcolor="#D1C4E9" shape=vnode_shape style=filled]
+	N6 [label="Rewilding Initiatives" color="#A188D0" fillcolor="#DACBE3" shape=rectangle style=filled]
+	N7 [label="Carbon Sequestration in Habitats" color="#FFC107" fillcolor="#FFECB3" shape=vnode_shape style=filled]
+	N8 [label="Policy Advocacy" color="#FFC107" fillcolor="#FFECB3" shape=action style=filled]
+	N9 [label="Drone_based Monitoring" color="#A188D0" fillcolor="#DACBE3" shape=vnode_shape style=filled]
+	N10 [label="Captive Breeding Programs" color="#A188D0" fillcolor="#DACBE3" shape=diamond style=filled]
+	N11 [label="Forestry Practices for Conservation" color="#FFC107" fillcolor="#FFECB3" shape=action style=filled]
+	N12 [label="Sustainable Resource Management" color="#FFC107" fillcolor="#FFECB3" shape=preparation style=filled]
+	N13 [label="Fundraising for Conservation" color="#7E57C2" fillcolor="#D1C4E9" shape=rect style=filled]
+	N14 [label="Wetland Restoration" color="#A188D0" fillcolor="#DACBE3" shape=rectangle style=filled]
+	N15 [label="Ecosystem Services Valuation" color="#A188D0" fillcolor="#DACBE3" shape=hexagon style=filled]
+	N16 [label="Protected Area Management" color="#FFC107" fillcolor="#FFECB3" shape=rect style=filled]
+	S0 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFC107" fillcolor="#FFECB3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Community Engagement {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Community Engagement"
+		nest0_0 [label="Wildlife Rescue and Rehabilitation" color="#7E57C2" fillcolor="#D1C4E9" shape=hexagon style=filled]
+		nest0_1 [label="Conservation Education" color="#FFC107" fillcolor="#FFECB3" shape=multipledocuments style=filled]
+		nest0_2 [label="International Treaties Enforcement" color="#A188D0" fillcolor="#DACBE3" shape=predefinedprocess style=filled]
+		nest0_3 [label="GIS Mapping for Habitats" color="#7E57C2" fillcolor="#D1C4E9" shape=inputoutput style=filled]
+	}
+	subgraph cluster_Population Dynamics Study {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Population Dynamics Study"
+		nest1_0 [label="Species Monitoring" color="#FFC107" fillcolor="#FFECB3" shape=inputoutput style=filled]
+		nest1_1 [label="Invasive Species Control" color="#FFC107" fillcolor="#FFECB3" shape=document style=filled]
+		nest1_2 [label="Human_Wildlife Conflict Mitigation" color="#FFC107" fillcolor="#FFECB3" shape=ellipse style=filled]
+		nest1_3 [label="Pollution Impact Assessment" color="#A188D0" fillcolor="#DACBE3" shape=multipledocuments style=filled]
+	}
+	N0 -> N1 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#FFC107" penwidth=1.5 style=dashed label="habitats_preserves" dir=forward]
+	N9 -> N10 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N15 -> N16 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	N13 -> nest0_0 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N9 [color="#FFC107" penwidth=1.5 style=solid label="partners" dir=forward]
+	nest1_0 -> nest1_1 [color="#7E57C2" penwidth=1.5 style=dashed label="rehabilitates" dir=forward]
+	nest1_1 -> nest1_2 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N12 -> nest1_0 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	nest1_3 -> N3 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	N6 -> S0 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N15 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> S1 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	S1 -> N15 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	S1 -> N14 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#7E57C2" penwidth=1.5 style=solid label="researches" dir=forward]
+	M1 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_336.dot

@@ -0,0 +1,68 @@
+digraph {
+	rankdir=LR
+	N0 [label="IT Operations Automation" color="#6FE1D5" fillcolor="#C9EFEC" shape=preparation style=filled]
+	N1 [label="Finance Process Automation" color="#6FE1D5" fillcolor="#C9EFEC" shape=parallelogram style=filled]
+	N2 [label="Error Handling in Automation" color="#673AB7" fillcolor="#D1C4E9" shape=preparation style=filled]
+	N3 [label="Decision Automation" color="#673AB7" fillcolor="#D1C4E9" shape=ellipse style=filled]
+	N4 [label="Automated Data Validation" color="#673AB7" fillcolor="#D1C4E9" shape=inputoutput style=filled]
+	N5 [label="Audit Trail for Automation" color="#673AB7" fillcolor="#D1C4E9" shape=hexagon style=filled]
+	N6 [label="Business Process Management" color="#FF5722" fillcolor="#FFCCBC" shape=hexagon style=filled]
+	N7 [label="Optical Character Recognition for Automation" color="#673AB7" fillcolor="#D1C4E9" shape=vnode_shape style=filled]
+	N8 [label="User Training for Automated Systems" color="#673AB7" fillcolor="#D1C4E9" shape=ellipse style=filled]
+	N9 [label="Process Mining" color="#FF5722" fillcolor="#FFCCBC" shape=database style=filled]
+	N10 [label="Chatbot Integration" color="#FF5722" fillcolor="#FFCCBC" shape=inputoutput style=filled]
+	N11 [label="Process Mapping" color="#673AB7" fillcolor="#D1C4E9" shape=action style=filled]
+	N12 [label="Orchestration of Processes" color="#FF5722" fillcolor="#FFCCBC" shape=diamond style=filled]
+	S0 [label="" color="#6FE1D5" fillcolor="#C9EFEC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FF5722" fillcolor="#FFCCBC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#6FE1D5" fillcolor="#C9EFEC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Change Management for Automation {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Change Management for Automation"
+		nest0_0 [label="Performance Monitoring of Bots" color="#6FE1D5" fillcolor="#C9EFEC" shape=hexagon style=filled]
+		nest0_1 [label="Return on Investment Calculation" color="#FF5722" fillcolor="#FFCCBC" shape=parallelogram style=filled]
+		nest0_2 [label="Robotic Process Automation Implementation" color="#6FE1D5" fillcolor="#C9EFEC" shape=ellipse style=filled]
+		nest0_3 [label="Intelligent Automation" color="#673AB7" fillcolor="#D1C4E9" shape=document style=filled]
+	}
+	subgraph cluster_Automation Opportunity Identification {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Automation Opportunity Identification"
+		nest1_0 [label="Customer Service Automation" color="#673AB7" fillcolor="#D1C4E9" shape=rect style=filled]
+		nest1_1 [label="Scripting for Automation" color="#FF5722" fillcolor="#FFCCBC" shape=database style=filled]
+	}
+	N0 -> N1 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#6FE1D5" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#6FE1D5" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#6FE1D5" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FF5722" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#673AB7" penwidth=1.5 style=solid label="errors_detects" dir=forward]
+	N8 -> N9 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#6FE1D5" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> nest0_3 [color="#6FE1D5" penwidth=1.5 style=solid dir=forward]
+	N11 -> nest0_0 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	nest0_3 -> N11 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	N10 -> nest1_0 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> S0 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	S0 -> N7 [color="#6FE1D5" penwidth=1.5 style=dashed label="reduces_costs" dir=forward]
+	S0 -> N11 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S1 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	S1 -> N7 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	S1 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> M1 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#FF5722" penwidth=1.5 style=solid label="increases_efficiency" dir=forward]
+	N4 -> M1 [color="#6FE1D5" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N8 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_34.dot

@@ -0,0 +1,68 @@
+digraph {
+	rankdir=RL
+	N0 [label="Visa Application" color="#AB47BC" fillcolor="#F3E5F5" shape=predefinedprocess style=filled]
+	N1 [label="Hotel Check_in" color="#FFE470" fillcolor="#FFFAE0" shape=parallelogram style=filled]
+	N2 [label="Language Translation Service" color="#607D8B" fillcolor="#CFD8DC" shape=database style=filled]
+	N3 [label="Tourist Information Desk" color="#607D8B" fillcolor="#CFD8DC" shape=hexagon style=filled]
+	N4 [label="Loyalty Program Enrollment" color="#AB47BC" fillcolor="#F3E5F5" shape=rect style=filled]
+	N5 [label="Lost and Found Service" color="#607D8B" fillcolor="#CFD8DC" shape=action style=filled]
+	N6 [label="Historical Site Exploration" color="#AB47BC" fillcolor="#F3E5F5" shape=ellipse style=filled]
+	N7 [label="Group Tour Coordination" color="#FFE470" fillcolor="#FFFAE0" shape=document style=filled]
+	S0 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#607D8B" fillcolor="#CFD8DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#607D8B" fillcolor="#CFD8DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Sightseeing Scheduling {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Sightseeing Scheduling"
+		nest0_0 [label="Itinerary Planning" color="#607D8B" fillcolor="#CFD8DC" shape=box style=filled]
+		nest0_1 [label="Event Reservation" color="#FFE470" fillcolor="#FFFAE0" shape=hexagon style=filled]
+		nest0_2 [label="Flight Booking" color="#AB47BC" fillcolor="#F3E5F5" shape=hexagon style=filled]
+		nest0_3 [label="Passport Renewal Assistance" color="#FFE470" fillcolor="#FFFAE0" shape=predefinedprocess style=filled]
+	}
+	subgraph cluster_Currency Exchange {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Currency Exchange"
+		nest1_0 [label="Custom Tour Package Creation" color="#607D8B" fillcolor="#CFD8DC" shape=inputoutput style=filled]
+		nest1_1 [label="Travel Blog Creation" color="#AB47BC" fillcolor="#F3E5F5" shape=rect style=filled]
+		nest1_2 [label="Trip Sharing" color="#AB47BC" fillcolor="#F3E5F5" shape=database style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#607D8B" penwidth=1.5 style=solid label="entertains" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#FFE470" penwidth=1.5 style=dashed label="automates" dir=forward]
+	nest0_1 -> nest0_2 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N5 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> nest1_0 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N1 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N4 -> S0 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N7 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	S0 -> N6 [color="#AB47BC" penwidth=1.5 style=solid label="promotes" dir=forward]
+	N4 -> S2 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	S2 -> N7 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N6 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	N0 -> M0 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N3 -> M0 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	M0 -> N7 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M1 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N6 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> M2 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	M2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_348.dot

@@ -0,0 +1,67 @@
+digraph {
+	rankdir=LR
+	N0 [label="Game Server Management" color="#F06292" fillcolor="#FCE4EC" shape=hexagon style=filled]
+	N1 [label="Fan Community Building" color="#673AB7" fillcolor="#D1C4E9" shape=diamond style=filled]
+	N2 [label="Gaming Hardware Optimization" color="#388E3C" fillcolor="#F1F8E9" shape=preparation style=filled]
+	N3 [label="Training Regimen" color="#388E3C" fillcolor="#F1F8E9" shape=document style=filled]
+	N4 [label="Brand Partnerships" color="#673AB7" fillcolor="#D1C4E9" shape=diamond style=filled]
+	N5 [label="Social Media Management" color="#388E3C" fillcolor="#F1F8E9" shape=document style=filled]
+	N6 [label="Game Publisher Relations" color="#673AB7" fillcolor="#D1C4E9" shape=predefinedprocess style=filled]
+	N7 [label="Ticketing Sales" color="#388E3C" fillcolor="#F1F8E9" shape=vnode_shape style=filled]
+	N8 [label="Talent Representation" color="#673AB7" fillcolor="#D1C4E9" shape=inputoutput style=filled]
+	N9 [label="Venue Setup" color="#F06292" fillcolor="#FCE4EC" shape=inputoutput style=filled]
+	S0 [label="" color="#673AB7" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#673AB7" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#388E3C" fillcolor="#F1F8E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#F06292" fillcolor="#FCE4EC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Esports Education Programs {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Esports Education Programs"
+		nest0_0 [label="Coaching Staff Management" color="#388E3C" fillcolor="#F1F8E9" shape=predefinedprocess style=filled]
+		nest0_1 [label="Anti_Cheat Measures" color="#F06292" fillcolor="#FCE4EC" shape=document style=filled]
+		nest0_2 [label="Player Scouting" color="#388E3C" fillcolor="#F1F8E9" shape=rect style=filled]
+	}
+	subgraph cluster_Content Creation {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Content Creation"
+		nest1_0 [label="Media Rights Negotiation" color="#F06292" fillcolor="#FCE4EC" shape=parallelogram style=filled]
+		nest1_1 [label="Live Streaming Production" color="#F06292" fillcolor="#FCE4EC" shape=database style=filled]
+		nest1_2 [label="Legal Advisory for Esports" color="#388E3C" fillcolor="#F1F8E9" shape=vnode_shape style=filled]
+		nest1_3 [label="Team Management" color="#F06292" fillcolor="#FCE4EC" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#F06292" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#673AB7" penwidth=1.5 style=solid label="trains" dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#388E3C" penwidth=1.5 style=dashed label="health_supports" dir=forward]
+	N4 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed label="develops_games" dir=forward]
+	nest0_2 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid label="advertises" dir=forward]
+	nest1_2 -> nest1_3 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	N4 -> nest1_0 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	nest1_3 -> N3 [color="#F06292" penwidth=1.5 style=dashed label="plays" dir=forward]
+	N2 -> S0 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	S0 -> N8 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	S0 -> N4 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S1 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#000000" penwidth=1.5 style=solid label="organizes" dir=forward]
+	N1 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	N0 -> M0 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N5 [color="#673AB7" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	N4 -> M1 [color="#F06292" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M1 -> N7 [color="#F06292" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_358.dot

@@ -0,0 +1,62 @@
+digraph {
+	rankdir=RL
+	N0 [label="Virtual Labs" color="#E91E63" fillcolor="#F8BBD0" shape=diamond style=filled]
+	N1 [label="Adaptive Learning Systems" color="#4CAF50" fillcolor="#C8E6C9" shape=database style=filled]
+	N2 [label="Blockchain for Educational Credentials" color="#4CAF50" fillcolor="#C8E6C9" shape=database style=filled]
+	N3 [label="EdTech Hardware Solutions" color="#4285F4" fillcolor="#D0E0F8" shape=inputoutput style=filled]
+	N4 [label="Personalized Learning Paths" color="#E91E63" fillcolor="#F8BBD0" shape=action style=filled]
+	N5 [label="Educational Data Mining" color="#E91E63" fillcolor="#F8BBD0" shape=vnode_shape style=filled]
+	N6 [label="Student Performance Tracking" color="#4CAF50" fillcolor="#C8E6C9" shape=rectangle style=filled]
+	N7 [label="Competency_Based Learning Platforms" color="#4CAF50" fillcolor="#C8E6C9" shape=action style=filled]
+	N8 [label="Simulations for Learning" color="#4CAF50" fillcolor="#C8E6C9" shape=parallelogram style=filled]
+	N9 [label="Student Information Systems" color="#E91E63" fillcolor="#F8BBD0" shape=box style=filled]
+	N10 [label="Open Educational Resources" color="#E91E63" fillcolor="#F8BBD0" shape=ellipse style=filled]
+	S1 [label="" color="#4285F4" fillcolor="#D0E0F8" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#4285F4" fillcolor="#D0E0F8" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#4CAF50" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Collaborative Learning Platforms {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Collaborative Learning Platforms"
+		nest0_0 [label="Formative Assessment Tools" color="#4CAF50" fillcolor="#C8E6C9" shape=rectangle style=filled]
+		nest0_1 [label="Virtual Reality in Education" color="#4CAF50" fillcolor="#C8E6C9" shape=action style=filled]
+		nest0_2 [label="Educational Apps Development" color="#4CAF50" fillcolor="#C8E6C9" shape=action style=filled]
+		nest0_3 [label="Massive Open Online Courses" color="#4285F4" fillcolor="#D0E0F8" shape=action style=filled]
+	}
+	subgraph cluster_Assessment Tools {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Assessment Tools"
+		nest1_0 [label="Curriculum Digitization" color="#4285F4" fillcolor="#D0E0F8" shape=preparation style=filled]
+		nest1_1 [label="E_Learning Platform Design" color="#E91E63" fillcolor="#F8BBD0" shape=multipledocuments style=filled]
+	}
+	N0 -> N1 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#E91E63" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#4CAF50" penwidth=1.5 style=solid label="experiences_personalizes" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#E91E63" penwidth=1.5 style=solid label="licenses" dir=forward]
+	nest0_1 -> nest0_2 [color="#E91E63" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N8 -> nest0_0 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	nest0_3 -> N6 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#E91E63" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> S1 [color="#E91E63" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#4CAF50" penwidth=1.5 style=solid label="AI_applies" dir=forward]
+	S1 -> N9 [color="#E91E63" penwidth=1.5 style=solid dir=forward]
+	S1 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> S2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N8 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N7 [color="#E91E63" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#E91E63" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N4 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_37.dot

@@ -0,0 +1,69 @@
+digraph {
+	rankdir=TB
+	N0 [label="Loan Pre_Approval" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
+	N1 [label="Escrow Setup" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
+	N2 [label="Property Management" color="#E57373" fillcolor="#FFEBEE" shape=diamond style=filled]
+	N3 [label="Open House Event" color="#E57373" fillcolor="#FFEBEE" shape=rect style=filled]
+	N4 [label="Offer Submission" color="#7E57C2" fillcolor="#EDE7F6" shape=preparation style=filled]
+	N5 [label="HOA Management" color="#7E57C2" fillcolor="#EDE7F6" shape=parallelogram style=filled]
+	N6 [label="Land Acquisition" color="#CD8FF2" fillcolor="#ECCFF5" shape=inputoutput style=filled]
+	N7 [label="Buyer Inquiry" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+	N8 [label="Commission Distribution" color="#E57373" fillcolor="#FFEBEE" shape=predefinedprocess style=filled]
+	N9 [label="Rental Agreement" color="#CD8FF2" fillcolor="#ECCFF5" shape=multipledocuments style=filled]
+	N10 [label="Contract Review" color="#CD8FF2" fillcolor="#ECCFF5" shape=preparation style=filled]
+	N11 [label="Eviction Process" color="#CD8FF2" fillcolor="#ECCFF5" shape=inputoutput style=filled]
+	N12 [label="Investment Property Analysis" color="#E57373" fillcolor="#FFEBEE" shape=predefinedprocess style=filled]
+	S0 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#CD8FF2" fillcolor="#ECCFF5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#7E57C2" fillcolor="#EDE7F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#CD8FF2" fillcolor="#ECCFF5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Ownership Transfer {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Ownership Transfer"
+		nest0_0 [label="Closing Meeting" color="#7E57C2" fillcolor="#EDE7F6" shape=multipledocuments style=filled]
+		nest0_1 [label="Market Trend Analysis" color="#CD8FF2" fillcolor="#ECCFF5" shape=multipledocuments style=filled]
+	}
+	subgraph cluster_Mortgage Application Assistance {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Mortgage Application Assistance"
+		nest1_0 [label="Price Negotiation" color="#CD8FF2" fillcolor="#ECCFF5" shape=ellipse style=filled]
+		nest1_1 [label="Property Listing" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#E57373" penwidth=1.5 style=solid label="closes" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#CD8FF2" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N2 -> nest0_0 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N2 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest1_0 [color="#7E57C2" penwidth=1.5 style=solid label="inspects" dir=forward]
+	nest1_1 -> N11 [color="#CD8FF2" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N4 [color="#CD8FF2" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S1 [color="#CD8FF2" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N12 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#CD8FF2" penwidth=1.5 style=dashed label="advertises" dir=forward]
+	N8 -> M1 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	M1 -> N10 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M2 [color="#CD8FF2" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}

test/diagrams/graph_hard/diagrams_63.dot

@@ -0,0 +1,79 @@
+digraph {
+	rankdir=BT
+	N0 [label="Third_Party Administrator Liaison" color="#BCB88A" fillcolor="#F5F5DC" shape=inputoutput style=filled]
+	N1 [label="Agent Training" color="#BCB88A" fillcolor="#F5F5DC" shape=preparation style=filled]
+	N2 [label="Broker Management" color="#61CAC3" fillcolor="#C2E8E6" shape=vnode_shape style=filled]
+	N3 [label="Underwriting" color="#61CAC3" fillcolor="#C2E8E6" shape=action style=filled]
+	N4 [label="Healthcare Provider Network Management" color="#61CAC3" fillcolor="#C2E8E6" shape=parallelogram style=filled]
+	N5 [label="Risk Assessment" color="#5C6BC0" fillcolor="#E8EAF6" shape=preparation style=filled]
+	N6 [label="Loss Prevention" color="#5C6BC0" fillcolor="#E8EAF6" shape=diamond style=filled]
+	N7 [label="Telematics Data Analysis" color="#5C6BC0" fillcolor="#E8EAF6" shape=action style=filled]
+	N8 [label="Payment Processing" color="#5C6BC0" fillcolor="#E8EAF6" shape=document style=filled]
+	N9 [label="Customer Onboarding" color="#BCB88A" fillcolor="#F5F5DC" shape=ellipse style=filled]
+	N10 [label="Subrogation" color="#5C6BC0" fillcolor="#E8EAF6" shape=hexagon style=filled]
+	N11 [label="Business Interruption Coverage" color="#5C6BC0" fillcolor="#E8EAF6" shape=preparation style=filled]
+	N12 [label="Claims Litigation Management" color="#BCB88A" fillcolor="#F5F5DC" shape=document style=filled]
+	N13 [label="Claim Adjustment" color="#BCB88A" fillcolor="#F5F5DC" shape=diamond style=filled]
+	N14 [label="Policy Cancellation" color="#5C6BC0" fillcolor="#E8EAF6" shape=rectangle style=filled]
+	N15 [label="Compliance Reporting" color="#61CAC3" fillcolor="#C2E8E6" shape=document style=filled]
+	N16 [label="Coverage Review" color="#61CAC3" fillcolor="#C2E8E6" shape=box style=filled]
+	N17 [label="Fraud Investigation" color="#5C6BC0" fillcolor="#E8EAF6" shape=multipledocuments style=filled]
+	N18 [label="Life Insurance Underwriting" color="#BCB88A" fillcolor="#F5F5DC" shape=preparation style=filled]
+	N19 [label="Premium Calculation" color="#BCB88A" fillcolor="#F5F5DC" shape=box style=filled]
+	N20 [label="Legal Review of Claims" color="#5C6BC0" fillcolor="#E8EAF6" shape=ellipse style=filled]
+	S0 [label="" color="#BCB88A" fillcolor="#F5F5DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#5C6BC0" fillcolor="#E8EAF6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#61CAC3" fillcolor="#C2E8E6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Customer Support {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Customer Support"
+		nest0_0 [label="Customer Communication" color="#5C6BC0" fillcolor="#E8EAF6" shape=multipledocuments style=filled]
+		nest0_1 [label="Claim Submission" color="#61CAC3" fillcolor="#C2E8E6" shape=ellipse style=filled]
+	}
+	subgraph cluster_Cyber Insurance Policy {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Cyber Insurance Policy"
+		nest1_0 [label="Policy Issuance" color="#61CAC3" fillcolor="#C2E8E6" shape=predefinedprocess style=filled]
+		nest1_1 [label="Property Damage Assessment" color="#61CAC3" fillcolor="#C2E8E6" shape=box style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#61CAC3" penwidth=1.5 style=dashed label="investigates" dir=forward]
+	N12 -> N13 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N15 -> N16 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N16 -> N17 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N17 -> N18 [color="#BCB88A" penwidth=1.5 style=solid label="pays" dir=forward]
+	N18 -> N19 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N19 -> N20 [color="#BCB88A" penwidth=1.5 style=dashed label="processes" dir=forward]
+	nest0_0 -> nest0_1 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest0_0 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N19 [color="#61CAC3" penwidth=1.5 style=dashed label="regulates" dir=forward]
+	nest1_0 -> nest1_1 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N8 -> nest1_0 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> N8 [color="#000000" penwidth=1.5 style=dashed label="assesses" dir=forward]
+	N0 -> S0 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#5C6BC0" penwidth=1.5 style=solid label="audits" dir=forward]
+	S0 -> N2 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N5 -> S1 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	S1 -> N20 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	S1 -> N17 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N12 -> M1 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#BCB88A" penwidth=1.5 style=solid dir=forward]
+	N4 -> M1 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N19 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_66.dot

@@ -0,0 +1,67 @@
+digraph {
+	rankdir=BT
+	N0 [label="Web Application Firewall Deployment" color="#FFB74D" fillcolor="#FFF3E0" shape=action style=filled]
+	N1 [label="Network Security" color="#FFB74D" fillcolor="#FFF3E0" shape=hexagon style=filled]
+	N2 [label="Threat Detection" color="#FFB74D" fillcolor="#FFF3E0" shape=action style=filled]
+	N3 [label="Dark Web Monitoring" color="#FFA726" fillcolor="#FFF3E0" shape=ellipse style=filled]
+	N4 [label="Endpoint Protection" color="#AB47BC" fillcolor="#F3E5F5" shape=diamond style=filled]
+	N5 [label="Identity Management" color="#AB47BC" fillcolor="#F3E5F5" shape=diamond style=filled]
+	N6 [label="Security Patch Management" color="#AB47BC" fillcolor="#F3E5F5" shape=parallelogram style=filled]
+	N7 [label="Threat Intelligence Gathering" color="#FFB74D" fillcolor="#FFF3E0" shape=preparation style=filled]
+	N8 [label="Security Policy Development" color="#AB47BC" fillcolor="#F3E5F5" shape=multipledocuments style=filled]
+	S0 [label="" color="#FFA726" fillcolor="#FFF3E0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFB74D" fillcolor="#FFF3E0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#AB47BC" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#AB47BC" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#AB47BC" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Security Awareness Training {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Security Awareness Training"
+		nest0_0 [label="Disaster Recovery Planning" color="#FFB74D" fillcolor="#FFF3E0" shape=ellipse style=filled]
+		nest0_1 [label="Cloud Security" color="#FFB74D" fillcolor="#FFF3E0" shape=action style=filled]
+		nest0_2 [label="Security Audit" color="#FFA726" fillcolor="#FFF3E0" shape=rectangle style=filled]
+		nest0_3 [label="Zero Trust Architecture" color="#FFA726" fillcolor="#FFF3E0" shape=database style=filled]
+	}
+	subgraph cluster_Supply Chain Security {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Supply Chain Security"
+		nest1_0 [label="Backup and Recovery" color="#AB47BC" fillcolor="#F3E5F5" shape=box style=filled]
+		nest1_1 [label="IoT Security" color="#AB47BC" fillcolor="#F3E5F5" shape=diamond style=filled]
+		nest1_2 [label="Malware Analysis" color="#FFB74D" fillcolor="#FFF3E0" shape=ellipse style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N4 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N1 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#AB47BC" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S1 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	S1 -> N4 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	S1 -> N3 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	N3 -> S2 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N8 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	S2 -> N6 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	S2 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N6 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#FFB74D" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N8 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_7.dot

@@ -0,0 +1,71 @@
+digraph {
+	rankdir=BT
+	N0 [label="Logistics Planning" color="#607D8B" fillcolor="#CFD8DC" shape=preparation style=filled]
+	N1 [label="Design Review" color="#607D8B" fillcolor="#CFD8DC" shape=box style=filled]
+	N2 [label="Procurement" color="#607D8B" fillcolor="#CFD8DC" shape=parallelogram style=filled]
+	N3 [label="Workflow Optimization" color="#7E57C2" fillcolor="#D1C4E9" shape=ellipse style=filled]
+	N4 [label="Automated Assembly" color="#7E57C2" fillcolor="#D1C4E9" shape=hexagon style=filled]
+	N5 [label="Shipping" color="#FBC02D" fillcolor="#FFFDE7" shape=preparation style=filled]
+	N6 [label="Environmental Compliance" color="#7E57C2" fillcolor="#D1C4E9" shape=inputoutput style=filled]
+	N7 [label="Quality Control" color="#607D8B" fillcolor="#CFD8DC" shape=rectangle style=filled]
+	N8 [label="Tool Path Generation" color="#FBC02D" fillcolor="#FFFDE7" shape=box style=filled]
+	N9 [label="Ergonomics Assessment" color="#7E57C2" fillcolor="#D1C4E9" shape=multipledocuments style=filled]
+	N10 [label="Serialization" color="#607D8B" fillcolor="#CFD8DC" shape=action style=filled]
+	S0 [label="" color="#607D8B" fillcolor="#CFD8DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#607D8B" fillcolor="#CFD8DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#7E57C2" fillcolor="#D1C4E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Supplier Qualification {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Supplier Qualification"
+		nest0_0 [label="Production Scheduling" color="#7E57C2" fillcolor="#D1C4E9" shape=diamond style=filled]
+		nest0_1 [label="Inventory Check" color="#607D8B" fillcolor="#CFD8DC" shape=predefinedprocess style=filled]
+		nest0_2 [label="Batch Tracking" color="#7E57C2" fillcolor="#D1C4E9" shape=rectangle style=filled]
+		nest0_3 [label="Inspection" color="#607D8B" fillcolor="#CFD8DC" shape=ellipse style=filled]
+	}
+	subgraph cluster_Component Sourcing {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Component Sourcing"
+		nest1_0 [label="Final Testing" color="#607D8B" fillcolor="#CFD8DC" shape=rect style=filled]
+		nest1_1 [label="Storage" color="#607D8B" fillcolor="#CFD8DC" shape=parallelogram style=filled]
+		nest1_2 [label="Factory Layout Planning" color="#607D8B" fillcolor="#CFD8DC" shape=box style=filled]
+	}
+	N0 -> N1 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#607D8B" penwidth=1.5 style=dashed label="cleans" dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N6 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	N8 -> nest1_0 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N1 [color="#607D8B" penwidth=1.5 style=solid label="welds" dir=forward]
+	N1 -> S0 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	S0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N3 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N3 -> S1 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N9 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> M1 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N5 -> M1 [color="#7E57C2" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N10 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M2 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	M2 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}

test/diagrams/graph_hard/diagrams_82.txt

@@ -0,0 +1,32 @@
+<Bridge Building, connectedTo, Demolition>
+<Budget Tracking, connectedTo, Blueprint Review>
+<Budget Tracking, connectedTo, HVAC Installation>
+<Budget Tracking, connectedTo, Quality Assurance>
+<Budget Tracking, connectedTo, Safety Inspection>
+<Demolition, connectedTo, Blueprint Review>
+<Drone Surveying, connectedTo, Site Logistics>
+<HVAC Installation, connectedTo, Safety Inspection>
+<Material Procurement, connectedTo, Blueprint Review>
+<Material Procurement, connectedTo, Budget Tracking>
+<Material Procurement, connectedTo, Quality Assurance>
+<Material Procurement, connectedTo, Site Decontamination>
+<Material Procurement, frames, Project Scheduling>
+<Occupancy Permit Acquisition, connectedTo, Steel Erection>
+<Permit Application, connectedTo, Project Scheduling>
+<Permit Application, connectedTo, Roofing Installation>
+<Permit Application, plans, Quality Assurance>
+<Project Scheduling, connectedTo, Budget Tracking>
+<Project Scheduling, connectedTo, Quality Assurance>
+<Quality Assurance, connectedTo, HVAC Installation>
+<Road Construction, connectedTo, Site Decontamination>
+<Roofing Installation, connectedTo, Material Procurement>
+<Roofing Installation, connectedTo, Occupancy Permit Acquisition>
+<Roofing Installation, connectedTo, Project Scheduling>
+<Roofing Installation, connectedTo, Safety Inspection>
+<Roofing Installation, coordinates, Blueprint Review>
+<Safety Inspection, connectedTo, Blueprint Review>
+<Safety Inspection, connectedTo, Drone Surveying>
+<Site Decontamination, complies, Project Scheduling>
+<Site Decontamination, connectedTo, Quality Assurance>
+<Site Logistics, connectedTo, Road Construction>
+<Steel Erection, connectedTo, Bridge Building>