IfcRelAssignsToProcess

Natural language names
Weist Prozess zu - Relation
Rel Assigns To Process
Assignation à processus
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcRelAssignsToProcess
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      RelatingProcessMODIFIEDType changed from IfcProcess to IfcProcessSelect.
IFC4 Addendum 2 Technical Corrigendum 1 4.0.2.1
    IfcRelAssignsToProcess
      RelatedObjectsTypeMODIFIEDStatus changed to Deprecated.
IFC4x1 Final 4.1.0.0
    IfcRelAssignsToProcess
      RelatedObjectsTypeMODIFIEDStatus changed from Deprecated.
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 G
7RelatingProcessIfcProcessSelect Reference to the process to which the objects are assigned to.
IFC4 CHANGE Datatype expanded to include IfcProcess and IfcTypeProcess.
X
8QuantityInProcessIfcMeasureWithUnit? 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
#AttributeTypeCardinalityDescriptionG
IfcRoot
1GlobalIdIfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory? 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
3NameIfcLabel? 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? 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
6RelatedObjectsTypeIfcStrippedOptional? 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.
IFC4.3.0.1-CHANGE The attribute type has been changed to IfcStrippedOptional given that IfcObjectTypeEnum has been deleted.
X
IfcRelAssignsToProcess
7RelatingProcessIfcProcessSelect Reference to the process to which the objects are assigned to.
IFC4 CHANGE Datatype expanded to include IfcProcess and IfcTypeProcess.
X
8QuantityInProcessIfcMeasureWithUnit? Quantity of the object specific for the operation by this process. X
Definitions applying to General Usage

Concept inheritance

#ConceptTemplateModel View
IfcRoot
IdentitySoftware IdentityGeneral Usage
Revision ControlRevision ControlGeneral Usage
Formal representations
XML 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

References  References: IfcProcess IfcTypeProcess

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