IfcPropertyReferenceValue

Natural language names
Merkmal mit Bezugswert
Property Reference Value
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcPropertyReferenceValue
      UsageNameMODIFIEDType changed from IfcLabel to IfcText.
      PropertyReferenceMODIFIEDInstantiation changed to OPTIONAL.
IFC4 Addendum 1 4.0.1.0
    IfcPropertyReferenceValue
      HasConstraintsADDED
      HasApprovalsADDED
IFC4X3_ADD2 to IFC4X4_draft
    IfcPropertyReferenceValue
      PartOfMaterialOrProfilePropertiesADDED
Semantic definitions at the entity
Entity 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.

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.

Attribute definitions
#AttributeTypeCardinalityDescription G
3UsageNameIfcText? 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. X
4PropertyReferenceIfcObjectReferenceSelect? 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.
X
Inherited definitions from supertypes
Entity inheritance IfcSimpleProperty IfcProperty IfcPropertyAbstraction
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcPropertyAbstraction
HasExternalReferencesIfcExternalReferenceRelationship
@RelatedResourceObjects
S[0:?]Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.
IFC4 CHANGE New inverse attribute.
X
IfcProperty
1NameIfcIdentifier Name for this property. This label is the significant name string that defines the semantic meaning for the property. X
2SpecificationIfcText? Informative text to explain the property. X
PartOfPsetIfcPropertySet
@HasProperties
S[0:?]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.
X
PropertyForDependanceIfcPropertyDependencyRelationship
@DependingProperty
S[0:?]The property on whose value that of another property depends. X
PropertyDependsOnIfcPropertyDependencyRelationship
@DependantProperty
S[0:?]The relating property on which the value of the property depends. X
PartOfComplexIfcComplexProperty
@HasProperties
S[0:?]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.
X
HasConstraintsIfcResourceConstraintRelationship
@RelatedResourceObjects
? S[0:?]User-defined constraints for the property. X
HasApprovalsIfcResourceApprovalRelationship
@RelatedResourceObjects
? S[0:?]User-defined approvals for the property. X
PartOfMaterialOrProfilePropertiesIfcExtendedProperties
@Properties
S[0:?]Reference to the IfcMaterialProperties by which the IfcProperty is referenced. X
IfcSimpleProperty
IfcPropertyReferenceValue
3UsageNameIfcText? 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. X
4PropertyReferenceIfcObjectReferenceSelect? 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.
X
Formal representations
XML 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:sequence>
     <xs:element name="PropertyReference" nillable="true" minOccurs="0">
      <xs:complexType>
       <xs:group ref="ifc:IfcObjectReferenceSelect"/>
      </xs:complexType>
     </xs:element>
    </xs:sequence>
    <xs:attribute name="UsageName" type="ifc:IfcText" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcPropertyReferenceValue
 SUBTYPE OF (IfcSimpleProperty);
  UsageName : OPTIONAL IfcText;
  PropertyReference : OPTIONAL IfcObjectReferenceSelect;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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