IfcProperty

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

#	Attribute	Type	Cardinality	Description	G
1	Name	IfcIdentifier		Name for this property. This label is the significant name string that defines the semantic meaning for the property.	X
2	Specification	IfcText	?	Informative text to explain the property.	X
	PartOfPset	IfcPropertySet @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
	PropertyForDependance	IfcPropertyDependencyRelationship @DependingProperty	S[0:?]	The property on whose value that of another property depends.	X
	PropertyDependsOn	IfcPropertyDependencyRelationship @DependantProperty	S[0:?]	The relating property on which the value of the property depends.	X
	PartOfComplex	IfcComplexProperty @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
	HasConstraints	IfcResourceConstraintRelationship @RelatedResourceObjects	? S[0:?]	User-defined constraints for the property.	X
	HasApprovals	IfcResourceApprovalRelationship @RelatedResourceObjects	? S[0:?]	User-defined approvals for the property.	X
	PartOfMaterialOrProfileProperties	IfcExtendedProperties @Properties	S[0:?]	Reference to the IfcMaterialProperties by which the IfcProperty is referenced.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcPropertyAbstraction
	HasExternalReferences	IfcExternalReferenceRelationship @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
1	Name	IfcIdentifier		Name for this property. This label is the significant name string that defines the semantic meaning for the property.	X
2	Specification	IfcText	?	Informative text to explain the property.	X
	PartOfPset	IfcPropertySet @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
	PropertyForDependance	IfcPropertyDependencyRelationship @DependingProperty	S[0:?]	The property on whose value that of another property depends.	X
	PropertyDependsOn	IfcPropertyDependencyRelationship @DependantProperty	S[0:?]	The relating property on which the value of the property depends.	X
	PartOfComplex	IfcComplexProperty @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
	HasConstraints	IfcResourceConstraintRelationship @RelatedResourceObjects	? S[0:?]	User-defined constraints for the property.	X
	HasApprovals	IfcResourceApprovalRelationship @RelatedResourceObjects	? S[0:?]	User-defined approvals for the property.	X
	PartOfMaterialOrProfileProperties	IfcExtendedProperties @Properties	S[0:?]	Reference to the IfcMaterialProperties by which the IfcProperty is referenced.	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="Specification" 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;

  Specification : 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;

  PartOfMaterialOrProfileProperties : SET [0:?] OF IfcExtendedProperties FOR Properties;

END_ENTITY;

 EXPRESS-G diagram

	Merkmal
	Property
	Propriété