8.6.3.4 IfcPropertyReferenceValue

Merkmal mit Bezugswert

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.

HISTORY  New entity in IFC1.5. Entity has been renamed from IfcObjectReference in IFC2x.
IFC4 CHANGE  Attribute PropertyReference has been made OPTIONAL with upward compatibility for file based exchange.

XSD Specification:

 <xs:element name="IfcPropertyReferenceValue" type="ifc:IfcPropertyReferenceValue" substitutionGroup="ifc:IfcSimpleProperty" nillable="true"/>
 <xs:complexType name="IfcPropertyReferenceValue">
  <xs:complexContent>
   <xs:extension base="ifc:IfcSimpleProperty"/>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

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

Attribute Definitions:

UsageName : 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.

Inheritance Graph:

ENTITY IfcPropertyReferenceValue
ENTITY IfcPropertyAbstraction
INVERSE
ENTITY IfcProperty
Name : IfcIdentifier;
Description : OPTIONAL IfcStrippedOptional;
INVERSE
PartOfPset : SET OF IfcPropertySet FOR HasProperties;
ENTITY IfcSimpleProperty
ENTITY IfcPropertyReferenceValue
UsageName : OPTIONAL IfcStrippedOptional;
PropertyReference : OPTIONAL IfcStrippedOptional;
END_ENTITY;

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