IfcRelAssignsToActor

BACnet MVD

#### IfcRelAssignsToActor

Natural language names

| Weist Akteur zu - Relation
| Rel Assigns To Actor
| Assignation à acteur

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRelAssignsToActor |  |  |  |
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### Semantic definitions at the entity

Entity definition

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.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
7 | RelatingActor | IfcActor |  | Reference to the information about the actor. It comprises the information about the person or organization and its addresses. |  | X
8 | ActingRole | IfcActorRole | ? | Role of the actor played within the context of the assignment to the object(s). |  | X

Formal Propositions

Rule | Description
--- | ---
NoSelfReference | The instance to with the relation points shall not be contained in the set of RelatedObjects.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

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.

X

X

3 | Name | 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. | X | X
4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. |  | X
IfcRelationship
IfcRelAssigns
5 | RelatedObjects | IfcObjectDefinition | S[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

6

RelatedObjectsType

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.

X

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

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcRelAssignsToActor" type="ifc:IfcRelAssignsToActor" substitutionGroup="ifc:IfcRelAssigns" nillable="true"/>
<xs:complexType name="IfcRelAssignsToActor">
<xs:complexContent>
<xs:extension base="ifc:IfcRelAssigns">
<xs:sequence>
<xs:element name="RelatingActor" type="ifc:IfcActor" nillable="true"/>
<xs:element name="ActingRole" type="ifc:IfcActorRole" nillable="true" minOccurs="0"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcRelAssignsToActor
SUBTYPE OF (IfcRelAssigns);
RelatingActor : IfcActor;
ActingRole : OPTIONAL IfcActorRole;
WHERE
NoSelfReference : SIZEOF(QUERY(Temp <* SELF\IfcRelAssigns.RelatedObjects | RelatingActor :=: Temp)) = 0;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcActor

Link to this page