IfcRelAssignsToProduct

Item	Change	Description
IFC2x3 to IFC4
IfcRelAssignsToProduct
OwnerHistory	MODIFIED	Instantiation changed to OPTIONAL.
RelatingProduct	MODIFIED	Type changed from IfcProduct to IfcProductSelect.

Semantic definitions at the entity

Entity definition

The objectified relationship IfcRelAssignsToProduct handles the assignment of objects (subtypes of IfcObject) to a product (subtypes of IfcProduct). The Name attribute should be used to classify the usage of the IfcRelAssignsToProduct objectified relationship. The following Name values are proposed:

'Context' : Assignment of a context specific representation, such as of structural members to a different context representation (with potentially different decomposition breakdown) such as of building elements for a specific context specific representation.
'View' : Assignment of a product (via RelatingProduct) that is decomposed according to a discipline view, to another product (via RelatedObjects) that is decomposed according to a different discipline view. An example is the assignment of the architectural slab to a different decomposition of the pre manufactured sections of a slab (under a precast concrete discipline view).

HISTORY New entity in IFC2x

IFC2x3 CHANGE The reference of a product within a spatial structure is now handled by a new relationship object IfcRelReferencedInSpatialStructure. The IfcRelAssignsToProduct shall not be used to represent this relation from IFC2x3 onwards.

Attribute definitions

#	Attribute	Type	Cardinality	Description	B
7	RelatingProduct	IfcProductSelect	[1:1]	Reference to the product or product type to which the objects are assigned to.	X

Formal Propositions

Rule	Description
NoSelfReference	The instance to which the relation points, as provided by RelatingProduct shall not be contained in the set of RelatedObjects.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	B
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
IfcRelAssigns
5	RelatedObjects	IfcObjectDefinition	S[1:?]	Related objects, which are assigned to a single object. The type of the single (or relating) object is defined in the subtypes of IfcRelAssigns.	X
6	RelatedObjectsType	-		This attribute is out of scope for this model view definition and shall not be set.
IfcRelAssignsToProduct
7	RelatingProduct	IfcProductSelect	[1:1]	Reference to the product or product type to which the objects are assigned to.	X

Definitions applying to Bridge View

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Bridge View
	User Identity	Bridge View
	Object Ownership	Bridge View

Formal representations

XSD Specification

 <xs:element name="IfcRelAssignsToProduct" type="ifc:IfcRelAssignsToProduct" substitutionGroup="ifc:IfcRelAssigns" nillable="true"/>

 <xs:complexType name="IfcRelAssignsToProduct">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="RelatingProduct">

      <xs:complexType>

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

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelAssignsToProduct

 SUBTYPE OF (IfcRelAssigns);

  RelatingProduct : IfcProductSelect;

 WHERE

  NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingProduct :=: Temp)) = 0;
END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Weist Produkt zu - Relation
	Rel Assigns To Product
	Assignation à produit