IfcRelAssignsToProcess

Natural language names
deWeist Prozess zu - Relation
enRel Assigns To Process
frAssignation à processus
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcRelAssignsToProcess
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      RelatingProcessMODIFIEDType changed from IfcProcess to IfcProcessSelect.
Semantic definitions at the entity
Entity definition

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
Attribute definitions
#AttributeTypeCardinalityDescription C
7RelatingProcessIfcProcessSelect[1:1] Reference to the process to which the objects are assigned to. X
8QuantityInProcessIfcMeasureWithUnit[0:1] Quantity of the object specific for the operation by this process.X
Formal Propositions
RuleDescription
NoSelfReferenceThe instance to with the relation points as provided by RelatingProcess shall not be contained in the set of RelatedObjects.
Inherited definitions from supertypes
Entity inheritance IfcRelAssigns IfcRelationship IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcRoot
1GlobalIdIfcGloballyUniqueId[1:1] Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory[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
3NameIfcLabel[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
4DescriptionIfcText[0:1] Optional description, provided for exchanging informative comments.X
IfcRelationship
IfcRelAssigns
5RelatedObjectsIfcObjectDefinitionS[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
6RelatedObjectsTypeIfcObjectTypeEnum[0:1] Particular type of the assignment relationship. It can constrain the applicable object types, used within the role of RelatedObjects. X
IfcRelAssignsToProcess
7RelatingProcessIfcProcessSelect[1:1] Reference to the process to which the objects are assigned to. X
8QuantityInProcessIfcMeasureWithUnit[0:1] Quantity of the object specific for the operation by this process.X
Definitions applying to Common Use Definitions

Concept inheritance

#ConceptModel View
IfcRoot
Software IdentityCommon Use Definitions
Revision ControlCommon Use Definitions
Formal representations
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

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