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.

{ .change-ifc2x4}

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.
	HasApprovals	SET [0:?] OF IfcResourceApprovalRelationship FOR RelatedResourceObjects	User-defined approvals for the property.
	HasConstraints	SET [0:?] OF IfcResourceConstraintRelationship FOR RelatedResourceObjects	User-defined constraints for the property.
	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.
	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.
	PropertyDependsOn	SET [0:?] OF IfcPropertyDependencyRelationship FOR DependantProperty	The relating property on which the value of the property depends.
	PropertyForDependance	SET [0:?] OF IfcPropertyDependencyRelationship FOR DependingProperty	The property on whose value that of another property depends.
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 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