IFC Property Extraction

Read the effective property and quantity values of an IFC element. The hard part is not finding one IfcPropertySet ; it is resolving the type vs occurrence layering correctly and handling the IFC2x3 vs IFC4 inverse-attribute split.

This skill is read-side. For the write-side (attaching property sets) see ifc-impl-data-enrichment. For the entity definitions see ifc-syntax-property-sets and ifc-syntax-quantities.

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