IFC 4.3.x development

5.1.3.29 IfcRelAssignsToResource

Change log

IFC4

additions where_rules NoSelfReference
deletions where_rules WR1
modificationsattributes RelatingResource definitionChanged from IfcResource to IfcResourceSelect

5.1.3.29.1 Semantic definitions at the entity

The objectified relationship IfcRelAssignsToResource handles the assignment of objects (as subtypes of IfcObject), acting as a resource usage or consumption, to a resource (as subtypes of IfcResource).

EXAMPLE  The assignment of a resource usage to a construction resource is an application of this generic relationship. It could be an actor, as person or organization assigned to a labor resource, or a raw product assigned to a construction product or material resource).

HISTORY  New entity in IFC2x.

5.1.3.29.1 Attributes

#Attribute Type Description
IfcRoot
1GlobalId IfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world.
2OwnerHistory 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,

> NOTE  only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGE  The attribute has been changed to be OPTIONAL.
3Name 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.
4Description OPTIONAL IfcText Optional description, provided for exchanging informative comments.
IfcRelationship
IfcRelAssigns
5RelatedObjects SET [1:?] OF IfcObjectDefinitionRelated objects, which are assigned to a single object. The type of the single (or relating) object is defined in the subtypes of IfcRelAssigns.
6RelatedObjectsTypeOPTIONAL IfcObjectTypeEnum 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.
IfcRelAssignsToResource
7RelatingResource IfcResourceSelect Reference to the resource to which the objects are assigned to.

> IFC4 CHANGE Datatype expanded to include IfcResource and IfcTypeResource.

5.1.3.29.2 Entity inheritance

dot_inheritance IfcRelAssignsToResource IfcRelAssignsToResource IfcRelAssigns IfcRelAssigns IfcRelAssignsToResource->IfcRelAssigns IfcRelAssigns_children 5 more... IfcRelAssigns_children->IfcRelAssigns IfcRelationship IfcRelationship IfcRelAssigns->IfcRelationship IfcRelationship_children 5 more... IfcRelationship_children->IfcRelationship IfcRoot IfcRoot IfcRelationship->IfcRoot IfcObjectDefinition IfcObjectDefinition IfcObjectDefinition->IfcRoot IfcPropertyDefinition IfcPropertyDefinition IfcPropertyDefinition->IfcRoot

5.1.3.29.3 Definitions applying to General Usage

5.1.3.29.3.1 Identity

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

5.1.3.29.3.2 Revision Control

Ownership, history, and merge state is captured using IfcOwnerHistory.

5.1.3.29.4 Formal representations

ENTITY IfcRelAssignsToResource
 SUBTYPE OF (IfcRelAssigns);
	RelatingResource : IfcResourceSelect;
 WHERE
	NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingResource :=: Temp)) = 0;
END_ENTITY;