IFC 4.3.0.1 (IFC4X3_TC1)

8.16.3.11 IfcPropertyReferenceValue

8.16.3.11.1 Semantic definition

The IfcPropertyReferenceValue allows a property value to be of type of an resource level entity. The applicable entities that can be used as value references are given by the IfcObjectReferenceSelect.

8.16.3.11.2 Entity inheritance

8.16.3.11.3 Attributes

# Attribute Type Description
IfcPropertyAbstraction (1)
HasExternalReferences SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects

Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.

IfcProperty (8)
1 Name IfcIdentifier

Name for this property. This label is the significant name string that defines the semantic meaning for the property.

2 Specification OPTIONAL IfcText

URI reference to a location with semantic definition or informative text to explain the property.

PartOfPset SET [0:?] OF IfcPropertySet FOR HasProperties

Reference to the IfcPropertySet by which the IfcProperty is referenced.

PropertyForDependance SET [0:?] OF IfcPropertyDependencyRelationship FOR DependingProperty

The property on whose value that of another property depends.

PropertyDependsOn SET [0:?] OF IfcPropertyDependencyRelationship FOR DependantProperty

The relating property on which the value of the property depends.

PartOfComplex SET [0:?] OF IfcComplexProperty FOR HasProperties

Reference to the IfcComplexProperty in which the IfcProperty is contained.

HasConstraints SET [0:?] OF IfcResourceConstraintRelationship FOR RelatedResourceObjects

User-defined constraints for the property.

HasApprovals SET [0:?] OF IfcResourceApprovalRelationship FOR RelatedResourceObjects

User-defined approvals for the property.

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IfcPropertyReferenceValue (2)
3 UsageName OPTIONAL IfcText

Description of the use of the referenced value within the property. It is a descriptive text that may hold an expression or other additional information.

4 PropertyReference OPTIONAL IfcObjectReferenceSelect

Reference to another property entity through one of the select types in the IfcObjectReferenceSelect.

Table 8.16.3.11.A

8.16.3.11.4 Formal representation

ENTITY IfcPropertyReferenceValue
 SUBTYPE OF (IfcSimpleProperty);
	UsageName : OPTIONAL IfcText;
	PropertyReference : OPTIONAL IfcObjectReferenceSelect;
END_ENTITY;

8.16.3.11.5 References

8.16.3.11.6 Changelog

8.16.3.11.6.1 IFC4

  • attribute PropertyReference optional, Changed from "False" to "True"
  • attribute UsageName type, Changed from "IfcLabel" to "IfcText"