Revit MEP (RM) — Analysis

Prefix: RM | Building type: HospitalAuckland | Schema: IFC4

Source Files

Three discipline IFCs in DAGCompiler/lib/input/IFC/UNMERGED/: - Ifc4_Revit_ARC.ifc — Architectural - Ifc4_Revit_STR.ifc — Structural - Ifc4_HospitalAuckland.ifc — MEP

Merged: DAGCompiler/lib/input/IFC/Ifc4_Revit_Federated.ifc (S144, 13.7 MB, 126K entities) Merged via tools/federation_preprocessor.py (IfcPatch MergeProjects, GUID-preserving).

GUID Collision Risk

Revit discipline exports may have overlapping GUIDs across files (same issue as Hospital, S136). Extraction must use --guid-prefix per discipline to avoid silent dedup. See commit 7c9be97a — extract.py --guid-prefix DISC --append.

Current State

• classify_rm.yaml exists (5 storeys: L1, L2, L3, Roof, Unknown)
• RM_extracted.db — empty (extraction never ran on federated IFC)
• RM_BOM.db — empty
• Pipeline: 4/7 PASS (fails on empty extraction)

Next Steps

1. Run extraction on Ifc4_Revit_Federated.ifc with GUID prefixing
2. Verify storey mapping in YAML matches IFC storeys
3. Run full pipeline to get GEO proof output

Copyright (c) 2025-2026 Redhuan D. Oon. MIT Licensed.