IFC 4.3.x development

5.1.3.23 IfcRelAssignsToActor

Change log

IFC4

additionswhere_rulesNoSelfReference
deletionswhere_rulesWR1

5.1.3.23.1 Semantic definitions at the entity

The objectified relationship IfcRelAssignsToActor handles the assignment of objects (subtypes of IfcObject) to an actor (subtypes of IfcActor).

The IfcRelAssignsToActor objectified relationship defines a relationship between an IfcActor and one or many objects. A particular role of the actor played in that relationship can be associated. If specified, it takes priority over the role that may be directly assigned to the person or organization.

EXAMPLE  An occupant (as an actor) may rent a flat (as a collection of spaces or a zone). This would be an application of this generic relationship.

Reference to the objects (or single object) on which the actor acts upon in a certain role (if given) is specified in the inherited RelatedObjects attribute.

HISTORY  New entity in IFC2.0. Has been renamed from IfcRelActsUpon in IFC2x.

5.1.3.23.1 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.
IfcRelAssignsToActor
7RelatingActor IfcActor Reference to the information about the actor. It comprises the information about the person or organization and its addresses.
8ActingRole OPTIONAL IfcActorRole Role of the actor played within the context of the assignment to the object(s).

5.1.3.23.2 Entity inheritance

dot_inheritance IfcRelAssignsToActor IfcRelAssignsToActor IfcRelAssigns IfcRelAssigns IfcRelAssignsToActor->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

5.1.3.23.3 Definitions applying to General Usage

5.1.3.23.3.1 Identity

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

5.1.3.23.3.2 Revision Control

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

5.1.3.23.4 Formal representations

ENTITY IfcRelAssignsToActor
 SUBTYPE OF (IfcRelAssigns);
	RelatingActor : IfcActor;
	ActingRole : OPTIONAL IfcActorRole;
 WHERE
	NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingActor :=: Temp)) = 0;
END_ENTITY;