5.1.3.27 IfcRelAssignsToProcess

Assignation à processus
Weist Prozess zu - Relation

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

EXAMPLE  It may be common to define processes during estimating or scheduling that describe design tasks (resulting in documents), procurement tasks (resulting in construction materials), planning tasks (resulting in processes), etc. Furthermore, the ways in which process can operate on something might include "installs", "finishes", "transports", "removes", etc. The ways are described as operation types.

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.

NOTE  The agreement on valid and recognizable values for the Name attribute is part of view definitions and implementer agreements.
HISTORY  New entity in IFC1.5. Has been renamed from IfcRelProcessOperatesOn in IFC2x.
IFC4 CHANGE  The data type RelatingProcess has been extended to cover also IfcTypeProcess

XSD Specification:

 <xs:element name="IfcRelAssignsToProcess" type="ifc:IfcRelAssignsToProcess" substitutionGroup="ifc:IfcRelAssigns" nillable="true"/>
 <xs:complexType name="IfcRelAssignsToProcess">
  <xs:complexContent>
   <xs:extension base="ifc:IfcRelAssigns">
    <xs:sequence>
     <xs:element name="RelatingProcess">
      <xs:complexType>
       <xs:group ref="ifc:IfcProcessSelect"/>
      </xs:complexType>
     </xs:element>
     <xs:element name="QuantityInProcess" type="ifc:IfcMeasureWithUnit" nillable="true" minOccurs="0"/>
    </xs:sequence>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

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

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

RelatingProcess : Reference to the process to which the objects are assigned to.
IFC4 CHANGE Datatype expanded to include IfcProcess and IfcTypeProcess.
QuantityInProcess : Quantity of the object specific for the operation by this process.

Formal Propositions:

NoSelfReference : The instance to with the relation points as provided by RelatingProcess shall not be contained in the set of RelatedObjects.

Inheritance Graph:

ENTITY IfcRelAssignsToProcess
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcRelationship
ENTITY IfcRelAssigns
RelatedObjects : SET [1:?] OF IfcObjectDefinition;
RelatedObjectsType : OPTIONAL IfcObjectTypeEnum;
ENTITY IfcRelAssignsToProcess
RelatingProcess : IfcProcessSelect;
QuantityInProcess : OPTIONAL IfcMeasureWithUnit;
END_ENTITY;

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