IfcRepresentationItem

Natural language names
Semantic definitions at the entity
Entity definition

Definition from ISO/CD 10303-43:1992: A representation item is an element of product data that participates in one or more representations or contributes to the definition of another representation item. A representation item contributes to the definition of another representation item when it is referenced by that representation item.

Definition from IAI  The IfcRepresentationItem is used within (and only within - directly or indirectly through other IfcRepresentationItem's or IfcShapeAspect's) an IfcRepresentation to represent an IfcProductRepresentation. Most commonly these IfcRepresentationItem's are geometric or topological representation items, that can (but not need to) have presentation style infomation assigned.

NOTE  Corresponding STEP entity: representation_item. Please refer to ISO/IS 10303-43:1994, for the final definition of the formal standard. The following changes have been made: The attribute 'name' and the WR1 have not been incorporated.
HISTORY  New entity in IFC Release 2x.
IFC2x Edition 3 CHANGE  The inverse attributes StyledByItem and LayerAssignments have been added. Upward compatibility for file based exchange is guaranteed.
Attribute definitions
#AttributeTypeCardinalityDescription A
Inherited definitions from supertypes
Entity inheritance IfcGeometricRepresentationItem IfcMappedItem IfcTopologicalRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionA
IfcRepresentationItem
Formal representations
XSD Specification
 <xs:element name="IfcRepresentationItem" type="ifc:IfcRepresentationItem" abstract="true" substitutionGroup="ifc:Entity" nillable="true"/>
 <xs:complexType name="IfcRepresentationItem" abstract="true">
  <xs:complexContent>
   <xs:extension base="ifc:Entity"/>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcRepresentationItem
 ABSTRACT SUPERTYPE OF(ONEOF(IfcGeometricRepresentationItem, IfcMappedItem, IfcTopologicalRepresentationItem));
 INVERSE
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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