5.1.3.27 IfcRelAssignsToProduct
5.1.3.27.1 Semantic definition
The objectified relationship IfcRelAssignsToProduct handles the assignment of objects (subtypes of IfcObject) to a product (subtypes of IfcProduct). The Name attribute should be used to classify the usage of the IfcRelAssignsToProduct objectified relationship. The following Name values are proposed:
- 'Context' : Assignment of a context specific representation, such as of structural members to a different context representation (with potentially different decomposition breakdown) such as of building elements for a specific context specific representation.
- 'View' : Assignment of a product (via RelatingProduct) that is decomposed according to a discipline view, to another product (via RelatedObjects) that is decomposed according to a different discipline view. An example is the assignment of the architectural slab to a different decomposition of the pre manufactured sections of a slab (under a precast concrete discipline view).
5.1.3.27.2 Entity inheritance
5.1.3.27.3 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 | |||
| IfcRelAssignsToProduct (1) | |||
| 7 | RelatingProduct | IfcProductSelect |
Reference to the product or product type to which the objects are assigned to. Datatype expanded to include IfcProduct and IfcTypeProduct. |
5.1.3.27.4 Formal propositions
| Name | Description |
|---|---|
| NoSelfReference |
The instance to which the relation points, as provided by RelatingProduct shall not be contained in the set of RelatedObjects. |
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5.1.3.27.5 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 | |||
5.1.3.27.6 Examples
5.1.3.27.7 Formal representation
ENTITY IfcRelAssignsToProduct
SUBTYPE OF (IfcRelAssigns);
RelatingProduct : IfcProductSelect;
WHERE
NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingProduct :=: Temp)) = 0;
END_ENTITY;