IfcProperty

Natural language names
deMerkmal
enProperty
frPropriété
Semantic definitions at the entity
Entity definition

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.
Attribute definitions
#AttributeTypeCardinalityDescription G
1NameIfcIdentifier Name for this property. This label is the significant name string that defines the semantic meaning for the property.X
2DescriptionIfcText? 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
Inherited definitions from supertypes
Entity inheritance IfcComplexProperty IfcSimpleProperty 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
2DescriptionIfcText? 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
Formal representations
XML 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 [0:?] OF IfcPropertySet FOR HasProperties;
  PropertyForDependance : SET [0:?] OF IfcPropertyDependencyRelationship FOR DependingProperty;
  PropertyDependsOn : SET [0:?] OF IfcPropertyDependencyRelationship FOR DependantProperty;
  PartOfComplex : SET [0:?] OF IfcComplexProperty FOR HasProperties;
  HasConstraints : SET [0:?] OF IfcResourceConstraintRelationship FOR RelatedResourceObjects;
  HasApprovals : SET [0:?] OF IfcResourceApprovalRelationship FOR RelatedResourceObjects;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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