added 7 BIM models (Rioverside project) + updated bibtex for V2

README.md

@@ -46,7 +46,7 @@ A benchmark dataset for evaluating BIM (Building Information Modeling) comprehen
 
 ## Features
 
-- **21 BIM projects** with 37 IFC models across architectural, structural, MEP, and specialty disciplines
+- **22 BIM projects** with 51 IFC models across architectural, structural, MEP, and specialty disciplines
 - **1,027 question-answer pairs** covering diverse BIM information retrieval tasks
 - **4 question categories** based on data retrieval complexity (direct retrieval, computational aggregation, geometric/spatial computation, incomplete information)
 - **Rich contextual data**: original IFC files, model cards, license documentation
@@ -78,7 +78,8 @@ ifc-bench/
 │   ├── schependomlaan/
 │   ├── sixty5/
 │   ├── smiley_west/
-│   └── wbdg_office/
+│   ├── wbdg_office/
+│   └── west_riverside_hospital/
 │       ├── arc.ifc            # IFC model files
 │       ├── model_card.md      # Project metadata
 │       ├── license.txt        # Model license
@@ -115,6 +116,7 @@ ifc-bench/
 | `sixty5` | Architecture, Electrical, Facade, Kitchen, Plumbing, Structural, Ventilation | CC BY 4.0 | living | [buildingSMART](https://github.com/buildingsmart-community/Community-Sample-Test-Files) |
 | `smiley_west` | Architecture | CC BY 4.0 | living | [KIT IFC Examples](https://www.ifcwiki.org/index.php?title=KIT_IFC_Examples) |
 | `wbdg_office` | Architecture, MEP, Structural | CC BY 4.0 | office | [WBDG](https://www.wbdg.org/bim/cobie/common-bim-files) |
+| `west_riverside_hospital` | Architecture, Structural, Mechanical, Plumbing, Electrical, Fire Alarm, Sprinklers | CC BY 3.0 | healthcare | [OpenIFC Model Repository](https://openifcmodel.cs.auckland.ac.nz/) |
 
 <table>
   <tr>
@@ -250,7 +252,23 @@ Please see our [Contribution Guidelines](docs/CONTRIBUTING.md) for details.
 
 ## Citation
 
-If using in research, please cite:
+If using IFC-Bench in research, please cite the paper that introduces the v2 benchmark (currently a preprint, submitted to *Automation in Construction*; this entry will be updated once the paper is accepted):
+
+```bibtex
+@misc{hellinBIMInformationExtraction2026,
+  title = {{{BIM Information Extraction Through LLM-based Adaptive Exploration}}},
+  author = {Hellin, Sylvain and Jang, Suhyung and Fuchs, Stefan and Nousias, Stavros and Borrmann, Andr{\'e}},
+  year = 2026,
+  eprint = {2605.01698},
+  archivePrefix = {arXiv},
+  primaryClass = {cs},
+  doi = {10.48550/arXiv.2605.01698},
+  url = {https://arxiv.org/abs/2605.01698},
+  note = {Preprint, submitted to Automation in Construction}
+}
+```
+
+The v1 benchmark was introduced in:
 
 ```bibtex
 @inproceedings{hellinNaturalLanguageInformation2025,
@@ -274,6 +292,8 @@ If using in research, please cite:
 - TUM BIM Fundamentals SS2025 students for fantasy building models
 - [Selahattin Doelger](https://github.com/buildingsmart-community/Community-Sample-Test-Files) for the Sixty5 models
 - The openBIM community for quality assurance
+- Wawan Solihin (Singapore) for donating the West Riverside Hospital multi-discipline IFC models
+- Professor Robert Amor (University of Auckland) for hosting the models on the OpenIFC Model Repository
 
 ---
 

projects/west_riverside_hospital/arc_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:989ace1d52f694ee94d80bd99aa81d0ff3d76cf21f34fcfd00a286ac897ed8a6
+size 80318141

projects/west_riverside_hospital/arc_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:230afa4d72a59c9ce18cdd9a7bc7c5c3e409a46078de6e14b19741b4cf92cf09
+size 80937122

projects/west_riverside_hospital/elec_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e443ca5e13756de89f50b61256e512925ce38b76d3a20a4a17fa35ffa6650c95
+size 4725101

projects/west_riverside_hospital/elec_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8e404c4e4c9085338383a89ae57a3a31ebe96ee406214392a1bf69a6775dcecc
+size 4435308

projects/west_riverside_hospital/fire_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:a94a9c179a5d22724576d8f4b668dec94a59b6dd447ea6c8a4ede5206c17201d
+size 906328

projects/west_riverside_hospital/fire_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f04e6fb62ad10cd78177d1d390758e912e3ad65881a184cca8ea1da07c59ae23
+size 905021

projects/west_riverside_hospital/license.txt

@@ -0,0 +1,21 @@
+West Riverside Hospital IFC Models
+Donated by Wawan Solihin (Singapore)
+Hosted on OpenIFC Model Repository by Professor Robert Amor, University of Auckland
+Source: https://openifcmodel.cs.auckland.ac.nz/
+
+This work is licensed under the Creative Commons Attribution 3.0 Unported License.
+To view a copy of this license, visit https://creativecommons.org/licenses/by/3.0/
+
+Under this license you are free to:
+  Share -- copy and redistribute the material in any medium or format
+  Adapt -- remix, transform, and build upon the material for any purpose, even commercially
+
+Under the following terms:
+  Attribution -- You must give appropriate credit, provide a link to the license,
+  and indicate if changes were made. You may do so in any reasonable manner, but
+  not in any way that suggests the licensor endorses you or your use.
+
+Attribution:
+  Solihin, W. West Riverside Hospital IFC Models. OpenIFC Model Repository,
+  University of Auckland. https://openifcmodel.cs.auckland.ac.nz/
+  License: CC BY 3.0 (confirmed by Professor Robert Amor, 1 April 2026)

projects/west_riverside_hospital/mech_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0c0551bf150dae56702515a53d55cf7f289d3637ccd7b399b092c47b9fa9272d
+size 78764170

projects/west_riverside_hospital/mech_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:04a29bc312fe0b026634ad86390e8b72c1d1c1765255351f787503d3d8ce1c13
+size 73047260

projects/west_riverside_hospital/model_card.md

@@ -0,0 +1,108 @@
+---
+project: west_riverside_hospital
+models:
+  - file: arc_ifc2x3.ifc
+    discipline: Architecture
+    schema: IFC2X3
+  - file: arc_ifc4.ifc
+    discipline: Architecture
+    schema: IFC4
+  - file: str_ifc2x3.ifc
+    discipline: Structural
+    schema: IFC2X3
+  - file: str_ifc4.ifc
+    discipline: Structural
+    schema: IFC4
+  - file: mech_ifc2x3.ifc
+    discipline: Mechanical
+    schema: IFC2X3
+  - file: mech_ifc4.ifc
+    discipline: Mechanical
+    schema: IFC4
+  - file: plumb_ifc2x3.ifc
+    discipline: Plumbing
+    schema: IFC2X3
+  - file: plumb_ifc4.ifc
+    discipline: Plumbing
+    schema: IFC4
+  - file: elec_ifc2x3.ifc
+    discipline: Electrical
+    schema: IFC2X3
+  - file: elec_ifc4.ifc
+    discipline: Electrical
+    schema: IFC4
+  - file: fire_ifc2x3.ifc
+    discipline: Fire Alarm
+    schema: IFC2X3
+  - file: fire_ifc4.ifc
+    discipline: Fire Alarm
+    schema: IFC4
+  - file: sprinkle_ifc2x3.ifc
+    discipline: Sprinklers
+    schema: IFC2X3
+  - file: sprinkle_ifc4.ifc
+    discipline: Sprinklers
+    schema: IFC4
+license: CC BY 3.0
+usage: healthcare
+author: "Solihin, W. West Riverside Hospital IFC Models. OpenIFC Model Repository, University of Auckland."
+source: "https://openifcmodel.cs.auckland.ac.nz/"
+---
+
+# west_riverside_hospital
+
+## Description
+
+A large multi-storey hospital building donated by Wawan Solihin (Singapore) and hosted on the
+OpenIFC Model Repository by Professor Robert Amor at the University of Auckland. The dataset
+provides seven disciplines each available in both IFC 2X3 and IFC 4, making it one of the most
+comprehensive multi-schema, multi-discipline BIM datasets in the public domain.
+
+The architectural model covers 8 levels (Level 1 through Level 7A, elevations 0--34000 mm).
+The structural model covers 15 levels. The mechanical model is exceptionally detailed with
+59,215 products across 11 levels.
+
+## Models
+
+| File | Discipline | Schema | Storeys | Products | Description |
+|------|-----------|--------|---------|----------|-------------|
+| `arc_ifc2x3.ifc` | Architecture | IFC2X3 | 8 | 15,316 | Full architectural model incl. walls, doors, windows, columns, members, plates |
+| `arc_ifc4.ifc` | Architecture | IFC4 | 8 | 15,316 | IFC4 counterpart -- identical product count |
+| `str_ifc2x3.ifc` | Structural | IFC2X3 | 15 | 2,915 | Structural frame: 1970 beams, 255 columns, slabs |
+| `str_ifc4.ifc` | Structural | IFC4 | 15 | 2,915 | IFC4 counterpart |
+| `mech_ifc2x3.ifc` | Mechanical | IFC2X3 | 11 | 59,215 | HVAC system: 8,732 duct/pipe segments, 1,064 terminals |
+| `mech_ifc4.ifc` | Mechanical | IFC4 | 11 | 59,215 | IFC4 counterpart -- 3,916 IfcPipeSegment elements |
+| `plumb_ifc2x3.ifc` | Plumbing | IFC2X3 | 5 | 26,942 | 4,308 pipe segments, 474 terminals |
+| `plumb_ifc4.ifc` | Plumbing | IFC4 | 5 | 26,942 | IFC4 counterpart |
+| `elec_ifc2x3.ifc` | Electrical | IFC2X3 | 7 | 6,305 | 1,410 flow terminals, 84 segments |
+| `elec_ifc4.ifc` | Electrical | IFC4 | 7 | 6,305 | IFC4 counterpart -- 1,272 IfcLightFixture elements |
+| `fire_ifc2x3.ifc` | Fire Alarm | IFC2X3 | 5 | 874 | Fire alarm devices |
+| `fire_ifc4.ifc` | Fire Alarm | IFC4 | 5 | 874 | IFC4 counterpart |
+| `sprinkle_ifc2x3.ifc` | Sprinklers | IFC2X3 | 5 | 38,255 | 6,228 pipe segments, 1,354 sprinkler heads |
+| `sprinkle_ifc4.ifc` | Sprinklers | IFC4 | 5 | 38,255 | IFC4 counterpart -- 1,354 IfcFireSuppressionTerminal |
+
+## Known Limitations
+
+- **No IfcSpace elements** in any model including the architectural file. Rooms and spaces are
+  not explicitly modelled as IFC spatial units; spatial analysis must rely on storey containment.
+- **IFC4 MEP files have fewer property sets** than their IFC2X3 counterparts. The
+  `Pset_DistributionFlowElementCommon` property set (containing `Reference`) was not carried
+  over during schema conversion for the mechanical, plumbing, and sprinkler models.
+- **Empty building name**: the `IfcBuilding.Name` attribute is blank in all files; the
+  `IfcProject.Name` is set to `"Project Number"`.
+- **Large unplaced element counts** in MEP files (e.g. 39,532 in mech): these are fitting and
+  accessory elements without direct spatial containment, which is typical for Revit MEP exports.
+- The fire alarm model (874 products, 12 property sets) contains minimal property data.
+
+## Architectural Level Breakdown
+
+| Level | Elevation (mm) | Elements |
+|-------|---------------|----------|
+| Level 1 | 0 | 844 |
+| Level 2 | 6,000 | 909 |
+| Level 3 | 11,000 | 1,167 |
+| Level 4 | 16,000 | 856 |
+| Level 5 | 21,000 | 788 |
+| Level 6 | 26,000 | 448 |
+| Level 7A | 31,000 | 154 |
+| Level 7 | 34,000 | 21 |

projects/west_riverside_hospital/plumb_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5f3e24ed70828387453d161caae7d7547b3c97803cc81df6c97849aa11676aa8
+size 24998920

projects/west_riverside_hospital/plumb_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bb53f0eb8f7295e91e0fb6ec6b79a30022a2e0e248714aab6bb1a8930c4793dd
+size 23762808

projects/west_riverside_hospital/sprinkle_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99e928f6714b69afd7e709b83f96904d3e3661640df7d5d4391415bd3c977c3e
+size 35659244

projects/west_riverside_hospital/sprinkle_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0e30c25a77ebcd75b2fc3a6cb87dc3891bd476f60a269e36eb5e0149bcc06ea7
+size 33990094

projects/west_riverside_hospital/str_ifc2x3.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5f404bfbce09d3de30ac360d98067ce4b40e7b6a9603ebea67d6d5fe9d48c0f2
+size 6398139

projects/west_riverside_hospital/str_ifc4.ifc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7eed88eb21dafdc5a5950d9b1ee18df3fd00fcd376a14fd1bae80658e371975e
+size 6484576