5.1.3.26 IfcRelAssignsToProcess

5.1.3.26.1 Semantic definition

The objectified relationship IfcRelAssignsToProcess handles the assignment of one or many objects to a process or activity. An object can be a product on which the process operates. Processes and activities can operate on things other than products, and can operate in ways other than input and output.

The inherited attribute RelatedObjects gives the references to the objects, or object type, which the process operates on. The RelatingProcess is the process or process type, that operates on the object. The operation types are captured in the inherited attribute Name.

5.1.3.26.2 Entity inheritance

- IfcRoot

5.1.3.26.3 Attributes

#	Attribute	Type	Description
IfcRoot (4)
1	GlobalId	IfcGloballyUniqueId	Assignment of a globally unique identifier within the entire software world.
2	OwnerHistory	OPTIONAL 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 is stored - either as addition, deletion or modification. IFC4-CHANGE The attribute has been changed to be OPTIONAL.
3	Name	OPTIONAL IfcLabel	An 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.
4	Description	OPTIONAL IfcText	An optional description, provided to exchange informative comments.
IfcRelAssigns (2)
5	RelatedObjects	SET [1:?] OF IfcObjectDefinition	Related objects, which are assigned to a single object. The type of the single (or relating) object is defined in the subtypes of IfcRelAssigns.
6	RelatedObjectsType	OPTIONAL IfcStrippedOptional	Particular type of the assignment relationship. It can constrain the applicable object types, used within the role of RelatedObjects. IFC4-DEPRECATION The attribute is deprecated and shall no longer be used. A NIL value should always be assigned. IFC4.3.0.1-CHANGE The attribute type has been changed to IfcStrippedOptional given that IfcObjectTypeEnum has been deleted.
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IfcRelAssignsToProcess (2)
7	RelatingProcess	IfcProcessSelect	Reference to the process to which the objects are assigned. IFC4-CHANGE Datatype expanded to include IfcProcess and IfcTypeProcess.
8	QuantityInProcess	OPTIONAL IfcMeasureWithUnit	Quantity of the object specific for the operation by this process.

Table 5.1.3.26.A

5.1.3.26.4 Formal propositions

Name	Description
NoSelfReference	The instance to which the relation points as provided by RelatingProcess shall not be contained in the set of RelatedObjects.
`SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects \| RelatingProcess :=: Temp)) = 0`

Table 5.1.3.26.B

5.1.3.26.5 Concept usage

Concept	Usage	Description
IfcRoot (2)
Revision Control	General	Ownership, history, and merge state is captured using IfcOwnerHistory.
Software Identity	General	IfcRoot assigns the globally unique ID. In addition, it may also provide a name and description for the concept.
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Table 5.1.3.26.C

5.1.3.26.6 Formal representation

ENTITY IfcRelAssignsToProcess
 SUBTYPE OF (IfcRelAssigns);
	RelatingProcess : IfcProcessSelect;
	QuantityInProcess : OPTIONAL IfcMeasureWithUnit;
 WHERE
	NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingProcess :=: Temp)) = 0;
END_ENTITY;