8.16.3.4 IfcProperty

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IfcProperty is an abstract generalization for all types of properties that can be associated with IFC objects through the property set mechanism.

HISTORY  New entity in IFC1.0.

XSD Specification:

 <xs:element name="IfcProperty" type="ifc:IfcProperty" abstract="true" substitutionGroup="ifc:IfcPropertyAbstraction" nillable="true"/>
 <xs:complexType name="IfcProperty" abstract="true">
  <xs:complexContent>
   <xs:extension base="ifc:IfcPropertyAbstraction">
    <xs:attribute name="Name" type="ifc:IfcIdentifier" use="optional"/>
    <xs:attribute name="Description" type="ifc:IfcText" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcProperty
ABSTRACT SUPERTYPE OF(ONEOF(IfcComplexProperty, IfcSimpleProperty))
SUBTYPE OF IfcPropertyAbstraction;
Name : IfcIdentifier;
Description : OPTIONAL IfcText;
INVERSE
PartOfPset : SET OF IfcPropertySet FOR HasProperties;
PropertyForDependance : SET OF IfcPropertyDependencyRelationship FOR DependingProperty;
PropertyDependsOn : SET OF IfcPropertyDependencyRelationship FOR DependantProperty;
PartOfComplex : SET OF IfcComplexProperty FOR HasProperties;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

Name : Name for this property. This label is the significant name string that defines the semantic meaning for the property.
Description : Informative text to explain the property.
PartOfPset : 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 : The property on whose value that of another property depends.
PropertyDependsOn : The relating property on which the value of the property depends.
PartOfComplex : 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.

Inheritance Graph:

ENTITY IfcProperty
ENTITY IfcPropertyAbstraction
INVERSE
HasExternalReferences : SET OF IfcExternalReferenceRelationship FOR RelatedResourceObjects;
ENTITY IfcProperty
Name : IfcIdentifier;
Description : OPTIONAL IfcText;
INVERSE
PartOfPset : SET OF IfcPropertySet FOR HasProperties;
PropertyForDependance : SET OF IfcPropertyDependencyRelationship FOR DependingProperty;
PropertyDependsOn : SET OF IfcPropertyDependencyRelationship FOR DependantProperty;
PartOfComplex : SET OF IfcComplexProperty FOR HasProperties;
END_ENTITY;

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