IfcProductDefinitionShape

Semantic definitions at the entity

Entity definition

Definition from ISO/CD 10303-42:1992: A product definition shape identifies a product’s shape as the conceptual idea of the form of a product.

Definition from IAI: The IfcProductDefinitionShape defines all shape relevant information about an IfcProduct. It allows for multiple geometric shape representations of the same product.

NOTE: The definition of this entity relates to the STEP entity product_definition_shape. Please refer to ISO/IS 10303-41:1994 for the final definition of the formal standard.

HISTORY: New Entity in IFC Release 1.5

Attribute definitions

#	Attribute	Type	Cardinality	Description	A
	ShapeOfProduct	IfcProduct @Representation	S[1:1]	The IfcProductDefinitionShape shall be used to provide a representation for a single instance of IfcProduct.

Formal Propositions

Rule	Description
WR11	Only representations of type IfcShapeModel, i.e. either IfcShapeRepresentation or IfcTopologyRepresentation* should be used to represent a product through the IfcProductDefinitionShape.*

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	A
IfcProductRepresentation
1	Name	-		This attribute is out of scope for this model view definition and shall not be set.
2	Description	-		This attribute is out of scope for this model view definition and shall not be set.
3	Representations	IfcRepresentation	L[1:?]	Contained list of representations (including shape representations). Each member defines a valid representation of a particular type within a particular representation context.	X
IfcProductDefinitionShape
	ShapeOfProduct	IfcProduct @Representation	S[1:1]	The IfcProductDefinitionShape shall be used to provide a representation for a single instance of IfcProduct.

Formal representations

XSD Specification

 <xs:element name="IfcProductDefinitionShape" type="ifc:IfcProductDefinitionShape" substitutionGroup="ifc:IfcProductRepresentation" nillable="true"/>

 <xs:complexType name="IfcProductDefinitionShape">

  <xs:complexContent>

   <xs:extension base="ifc:IfcProductRepresentation"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcProductDefinitionShape

 SUBTYPE OF (IfcProductRepresentation);

 INVERSE

  ShapeOfProduct : SET [1:1] OF IfcProduct FOR Representation;

 WHERE

  WR11 : SIZEOF(QUERY(temp <* Representations | 
  (NOT('IFCREPRESENTATIONRESOURCE.IFCSHAPEMODEL' IN TYPEOF(temp)))
)) = 0;
END_ENTITY;

 EXPRESS-G diagram