Natural language names
Ordnet Klassifikation zu - Relation
Rel Associates Classification
Association à classification
Change log
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      RelatedObjectsXXMODIFIEDType changed from IfcRoot to IfcDefinitionSelect.
      RelatingClassificationXXMODIFIEDType 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:

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
#AttributeTypeCardinalityDescription G
6RelatingClassificationIfcClassificationSelect Classification applied to the objects.X
Inherited definitions from supertypes
Entity inheritance IfcRelAssociates IfcRelationship IfcRoot
Attribute inheritance
1GlobalIdIfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory? 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.
IFC4 CHANGE  The attribute has been changed to be OPTIONAL.
3NameIfcLabel? 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
4DescriptionIfcText? Optional description, provided for exchanging informative comments.X
5RelatedObjectsIfcDefinitionSelectS[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.
IFC4 CHANGE  The attribute datatype has been changed from IfcRoot to IfcDefinitionSelect.
6RelatingClassificationIfcClassificationSelect Classification applied to the objects.X
Definitions applying to General Usage

Concept inheritance

#ConceptTemplateModel View
IdentitySoftware IdentityGeneral Usage
Revision ControlRevision ControlGeneral Usage
Formal representations
XML Specification
 <xs:element name="IfcRelAssociatesClassification" type="ifc:IfcRelAssociatesClassification" substitutionGroup="ifc:IfcRelAssociates" nillable="true"/>
 <xs:complexType name="IfcRelAssociatesClassification">
   <xs:extension base="ifc:IfcRelAssociates">
     <xs:element name="RelatingClassification">
       <xs:group ref="ifc:IfcClassificationSelect"/>
EXPRESS Specification
ENTITY IfcRelAssociatesClassification
 SUBTYPE OF (IfcRelAssociates);
  RelatingClassification : IfcClassificationSelect;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcClassification IfcClassificationReference

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