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 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.
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.
The agreement on valid and recognizable values for the Name attribute is part of view definitions and implementer agreements. New entity in IFC1.5. Has been renamed from IfcRelProcessOperatesOn in IFC2x. The data type RelatingProcess has been extended to cover also IfcTypeProcess5.1.3.26.2 Entity inheritance
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, Only the last modification is stored - either as addition, deletion or modification. The attribute has been changed to be OPTIONAL. |
| 3 | Name | OPTIONAL 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. |
| 4 | Description | OPTIONAL IfcText |
Optional description, provided for exchanging 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. The attribute is deprecated and shall no longer be used. A NIL value should always be assigned. The attribute type has been changed to IfcStrippedOptional given that IfcObjectTypeEnum has been deleted. |
| Click to show 6 hidden inherited attributes Click to hide 6 inherited attributes | |||
| IfcRelAssignsToProcess (2) | |||
| 7 | RelatingProcess | IfcProcessSelect |
Reference to the process to which the objects are assigned to. Datatype expanded to include IfcProcess and IfcTypeProcess. |
| 8 | QuantityInProcess | OPTIONAL IfcMeasureWithUnit |
Quantity of the object specific for the operation by this process. |
5.1.3.26.4 Formal propositions
| Name | Description |
|---|---|
| NoSelfReference |
The instance to with the relation points as provided by RelatingProcess shall not be contained in the set of RelatedObjects. |
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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 provide for a name and a description about the concept. |
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| Click to show 2 hidden inherited concepts Click to hide 2 inherited concepts | |||
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;