IfcRelAssignsToResource

Item	Change	Description
IFC2x3 to IFC4
IfcRelAssignsToResource
OwnerHistory	MODIFIED	Instantiation changed to OPTIONAL.
RelatingResource	MODIFIED	Type changed from IfcResource to IfcResourceSelect.

Semantic definitions at the entity

Entity definition

The objectified relationship IfcRelAssignsToResource handles the assignment of objects (as subtypes of IfcObject), acting as a resource usage or consumption, to a resource (as subtypes of IfcResource).

EXAMPLE The assignment of a resource usage to a construction resource is an application of this generic relationship. It could be an actor, as person or organization assigned to a labor resource, or a raw product assigned to a construction product or material resource).

HISTORY New entity in IFC2x.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
7	RelatingResource	IfcResourceSelect		Reference to the resource to which the objects are assigned to. IFC4 CHANGE Datatype expanded to include IfcResource and IfcTypeResource.	X

Formal Propositions

Rule	Description
NoSelfReference	The instance to with the relation points shall not be contained in the set of RelatedObjects.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRoot
1	GlobalId	IfcGloballyUniqueId		Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	?	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.	X
3	Name	IfcLabel	?	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	?	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	IfcObjectTypeEnum	?	Particular type of the assignment relationship. It can constrain the applicable object types, used within the role of RelatedObjects. IFC4 CHANGE The attribute is deprecated and shall no longer be used. A NIL value should always be assigned.	X
IfcRelAssignsToResource
7	RelatingResource	IfcResourceSelect		Reference to the resource to which the objects are assigned to. IFC4 CHANGE Datatype expanded to include IfcResource and IfcTypeResource.	X

#	Concept	Template	Model View
IfcRoot
	Identity	Software Identity	General Usage
	Revision Control	Revision Control	General Usage

Formal representations

XML Specification

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

 <xs:complexType name="IfcRelAssignsToResource">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="RelatingResource">

      <xs:complexType>

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

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelAssignsToResource

 SUBTYPE OF (IfcRelAssigns);

  RelatingResource : IfcResourceSelect;

 WHERE

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

 EXPRESS-G diagram

	Weist Ressource zu - Relation
	Rel Assigns To Resource
	Assignation à ressource

IfcRelAssignsToResource

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to General Usage

Formal representations