IfcMaterialDefinitionRepresentation

Definition from IAI: The IfcMaterialDefinitionRepresentation defines presentation information relating to IfcMaterial. It allows for multiple presentations of the same material for different geometric representation contexts.

NOTE The IfcMaterialDefinitionRepresentation is currently only used to define presentation information to material used at subtypes of IfcElement. The IfcMaterial is assigned to the subtype of IfcElement using the IfcRelAssociatesMaterial (eventually via other material related entities IfcMaterialLayerSetUsage, IfcMaterialLayerSet, IfcMaterialLayer).

HISTORY New entity in IFC Release 2x Edition 3.
IFC2x Edition 3 CHANGE The entity IfcMaterialDefinitionRepresentation has been added. Upward compatibility for file based exchange is guaranteed.

EXPRESS specification:

ENTITY IfcMaterialDefinitionRepresentation

SUBTYPE OF (

IfcProductRepresentation);

RepresentedMaterial

IfcMaterial;

WHERE

WR11

SIZEOF(QUERY(temp <* Representations | (NOT('IFCREPRESENTATIONRESOURCE.IFCSTYLEDREPRESENTATION' IN TYPEOF(temp))) )) = 0;

END_ENTITY;

Attribute definitions:

RepresentedMaterial

Reference to the material to which the representation applies.

Formal Propositions:

WR11

Only representations of type IfcStyledRepresentation should be used to represent material through the IfcMaterialRepresentation.

Inheritance graph

ENTITY IfcMaterialDefinitionRepresentation;

ENTITY IfcProductRepresentation;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

Representations

LIST [1:?] OF IfcRepresentation;

ENTITY IfcMaterialDefinitionRepresentation;

RepresentedMaterial

IfcMaterial;

END_ENTITY;