{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ChartGalaxy++ stored spatial relationships",
  "type": "array",
  "items": {
    "oneOf": [
      {
        "type": "object",
        "properties": {
          "relation_type": {
            "const": "relative_position"
          },
          "from_id": {
            "type": "string",
            "minLength": 1
          },
          "to_id": {
            "type": "string",
            "minLength": 1
          },
          "directions": {
            "type": "array",
            "minItems": 1,
            "maxItems": 2,
            "uniqueItems": true,
            "items": {
              "enum": [
                "left",
                "right",
                "above",
                "below"
              ]
            }
          }
        },
        "required": [
          "relation_type",
          "from_id",
          "to_id",
          "directions"
        ],
        "additionalProperties": false
      },
      {
        "type": "object",
        "properties": {
          "relation_type": {
            "const": "aligned_with"
          },
          "from_id": {
            "type": "string",
            "minLength": 1
          },
          "to_id": {
            "type": "string",
            "minLength": 1
          },
          "basis": {
            "type": "array",
            "minItems": 1,
            "uniqueItems": true,
            "items": {
              "enum": [
                "left",
                "right",
                "top",
                "bottom",
                "center_x",
                "center_y"
              ]
            }
          }
        },
        "required": [
          "relation_type",
          "from_id",
          "to_id",
          "basis"
        ],
        "additionalProperties": false
      },
      {
        "type": "object",
        "properties": {
          "relation_type": {
            "const": "bbox_overlaps"
          },
          "from_id": {
            "type": "string",
            "minLength": 1
          },
          "to_id": {
            "type": "string",
            "minLength": 1
          }
        },
        "required": [
          "relation_type",
          "from_id",
          "to_id"
        ],
        "additionalProperties": false
      },
      {
        "type": "object",
        "properties": {
          "relation_type": {
            "const": "bbox_distance"
          },
          "from_id": {
            "type": "string",
            "minLength": 1
          },
          "to_id": {
            "type": "string",
            "minLength": 1
          },
          "is_near": {
            "type": "boolean"
          },
          "distance_px": {
            "type": "number",
            "minimum": 0
          },
          "distance_ratio": {
            "type": "number",
            "minimum": 0
          }
        },
        "required": [
          "relation_type",
          "from_id",
          "to_id",
          "is_near",
          "distance_px",
          "distance_ratio"
        ],
        "additionalProperties": false
      }
    ]
  }
}