OptionalcostOptionalCostOrdered IFC4/IFC4X3 attribute references. Undefined means absent.
OptionalcostExisting nested value view retained for compatibility.
OptionalCostOrdered IFC4/IFC4X3 attribute references. Undefined means absent.
OptionalDescriptionOptionalGlobalOptionalIdentificationOptionalNameOptionalObjectOptionalparentOptionalpredefinedOptionalPredefinedExpress IDs of the IfcProduct instances assigned to this cost item,
via either IfcRelAssignsToProduct or IfcRelAssignsToControl. Tasks,
resources and actors assigned via IfcRelAssignsToControl are excluded
— that relationship also legitimately binds those, but this field is
a products-only view (#4877).
GlobalIds parallel to productExpressIds, same filtering.
Existing normalized quantity view; never falls back to product Qto.