IfcExtendedProperties

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcExtendedProperties			ADDED

Semantic definitions at the entity

Entity definition

The IfcExtendedProperties is an abstract supertype of all extensible property collections that are applicable to certain characterized entities. Instantiable subtypes of IfcExtendedProperties assign the property collection to a particular characterized entity.

NOTE Extensible property collections are provided for materials and profiles.

Instantiable subtypes have a set of Properties, each providing property name, value and unit and other instance information, depending on the subtype of IfcProperty referenced.

HISTORY New entity in IFC4.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	Name	IfcIdentifier	?	The name given to the set of properties.	X
2	Description	IfcText	?	Description for the set of properties.	X
3	Properties	IfcProperty	S[1:?]	The set of properties provided for this extended property collection.	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
IfcExtendedProperties
1	Name	IfcIdentifier	?	The name given to the set of properties.	X
2	Description	IfcText	?	Description for the set of properties.	X
3	Properties	IfcProperty	S[1:?]	The set of properties provided for this extended property collection.	X

Formal representations

XML Specification

 <xs:element name="IfcExtendedProperties" type="ifc:IfcExtendedProperties" abstract="true" substitutionGroup="ifc:IfcPropertyAbstraction" nillable="true"/>

 <xs:complexType name="IfcExtendedProperties" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcPropertyAbstraction">

    <xs:sequence>

     <xs:element name="Properties">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcProperty" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcProperty"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <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 IfcExtendedProperties

 ABSTRACT SUPERTYPE OF(ONEOF(IfcMaterialProperties, IfcProfileProperties))

 SUBTYPE OF (IfcPropertyAbstraction);

  Name : OPTIONAL IfcIdentifier;

  Description : OPTIONAL IfcText;

  Properties : SET [1:?] OF IfcProperty;

END_ENTITY;

 EXPRESS-G diagram

	erweiterbare Eigenschaften
	Extended Properties
	Propriétés étendues