IfcRelAssociatesClassification

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcRelAssociatesClassification
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
RelatedObjects	X	X	MODIFIED	Type changed from IfcRoot to IfcDefinitionSelect.
RelatingClassification	X	X	MODIFIED	Type changed from IfcClassificationNotationSelect to IfcClassificationSelect.

Semantic definitions at the entity

Entity definition

The objectified relationship IfcRelAssociatesClassification handles the assignment of a classification item (items of the select IfcClassificationSelect) to objects occurrences (subtypes of IfcObject) or object types (subtypes of IfcTypeObject).

The relationship is used to assign a classification item, or a classification system itself to objects. Depending on the type of the RelatingClassification it is either:

a reference to an classification item within an external classification system, or
a reference to the classification system itself

NOTE The reference to a classification item includes a link to the classification system within which the item is declared. It assigns the meaning of the classification item to the object (ocurrence or type). The reference to the classification system provides the information that the object (occurrence or type) is governed by the classification system but no assignment of a particular items has been done yet.

The inherited attribute RelatedObjects define the objects or object types to which the classification is applied. The attribute RelatingClassification is the reference to a classification, applied to the object(s). A single RelatingClassification can thereby be applied to one or multiple objects.

HISTORY New entity in IFC2x.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
6	RelatingClassification	IfcClassificationSelect	[1:1]	Classification applied to the objects.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, NOTE only the last modification in stored - either as addition, deletion or modification.	X
3	Name	IfcLabel	[0:1]	Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.	X
4	Description	IfcText	[0:1]	Optional description, provided for exchanging informative comments.	X
IfcRelationship
IfcRelAssociates
5	RelatedObjects	IfcDefinitionSelect	S[1:?]	Set of object or property definitions to which the external references or information is associated. It includes object and type objects, property set templates, property templates and property sets and contexts.	X
IfcRelAssociatesClassification
6	RelatingClassification	IfcClassificationSelect	[1:1]	Classification applied to the objects.	X

Definitions applying to Common Use Definitions

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Common Use Definitions
	Revision Control	Common Use Definitions

Formal representations

XSD Specification

 <xs:element name="IfcRelAssociatesClassification" type="ifc:IfcRelAssociatesClassification" substitutionGroup="ifc:IfcRelAssociates" nillable="true"/>

 <xs:complexType name="IfcRelAssociatesClassification">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="RelatingClassification">

      <xs:complexType>

       <xs:group ref="ifc:IfcClassificationSelect"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelAssociatesClassification

 SUBTYPE OF (IfcRelAssociates);

  RelatingClassification : IfcClassificationSelect;

END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Ordnet Klassifikation zu - Relation
	Rel Associates Classification
	Association à classification