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. IFC4-CHANGE New inverse attribute.
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. IFC4-CHANGE New inverse attribute to navigate from IfcProperty to IfcPropertySet with upward compatibility for file based exchange.
	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. IFC4-CHANGE The cardinality has changed to 0..n to allow reuse of instances of IfcProperty in several IfcComplexProperty with upward compatibility for file based exchange.
	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.
Click to show 9 hidden inherited attributes Click to hide 9 inherited attributes
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. IFC4-CHANGE The attribute has been made optional with upward compatibility for file based exchange.

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

IfcSimpleProperty