IfcOccupant

Natural language names
deMieter / Nutzer
enOccupant
frOccupant
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcOccupant
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      PredefinedTypeMODIFIEDInstantiation changed to OPTIONAL.
Semantic definitions at the entity
Entity definition

An occupant is a type of actor that defines the form of occupancy of a property.

The principal purpose of IfcOccupant is to determine the nature of occupancy of a property for a particular actor. All characteristics relating to the actor (name and organization details) are inherited from the IfcActor entity.

HISTORY  New entity in IFC2x
Attribute definitions
#AttributeTypeCardinalityDescription C
7PredefinedTypeIfcOccupantTypeEnum[0:1] Predefined occupant types from which that required may be set. X
Formal Propositions
RuleDescription
WR31The attribute ObjectType must be asserted when the value of the IfcOccupantTypeEnum is set to USERDEFINED.
Inherited definitions from supertypes
Entity inheritance IfcActor IfcObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcRoot
1GlobalIdIfcGloballyUniqueId[1:1] Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory[0:1] 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.
X
3NameIfcLabel[0:1] 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
4DescriptionIfcText[0:1] Optional description, provided for exchanging informative comments.X
IfcObjectDefinition
HasAssignmentsIfcRelAssigns
@RelatedObjects		S[0:?]Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups.X
NestsIfcRelNests
@RelatedObjects		S[0:1]References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only). X
IsNestedByIfcRelNests
@RelatingObject		S[0:?]References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). X
HasContextIfcRelDeclares
@RelatedDefinitions		S[0:1]References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object. X
IsDecomposedByIfcRelAggregates
@RelatingObject		S[0:?]References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts). X
DecomposesIfcRelAggregates
@RelatedObjects		S[0:1]References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only). X
HasAssociationsIfcRelAssociates
@RelatedObjects		S[0:?]Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.X
IfcObject
5ObjectTypeIfcLabel[0:1] The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.
X
IsDeclaredByIfcRelDefinesByObject
@RelatedObjects		S[0:1]Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. X
DeclaresIfcRelDefinesByObject
@RelatingObject		S[0:?]Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. X
IsTypedByIfcRelDefinesByType
@RelatedObjects		S[0:1]Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type. X
IsDefinedByIfcRelDefinesByProperties
@RelatedObjects		S[0:?]Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object. X
IfcActor
6TheActorIfcActorSelect[1:1] Information about the actor. X
IsActingUponIfcRelAssignsToActor
@RelatingActor		S[0:?]Reference to the relationship that associates the actor to an object. X
IfcOccupant
7PredefinedTypeIfcOccupantTypeEnum[0:1] Predefined occupant types from which that required may be set. X
Definitions applying to Common Use Definitions

 Instance diagram

Concept usage

Actor Assignment

The Actor Assignment concept applies to this entity as shown in Table 239.

TypeDescription
IfcSpatialStructureElementIndicates the property to be occupied. Particular details of the agreement relating to the occupancy of a property are dealt within the Pset_PropertyAgreement that is defined for the instance of IfcSpatialStructureElement. This means that an occupant may be related to a site, building, building storey or space through the IfcSpatialStructureElement.ElementComposition attribute. For instance, if the property concerned is several office spaces on a building storey, it might be appropriate to reference IfcBuildingStorey.ElementComposition=PARTIAL. Occupants of a property may be considered to be the parties to an agreement. The roles that the occupant may play in respect to an agreement are defined in the IfcOccupantTypeEnum enumeration. If the role is not specified by the predefined contents of this enumeration, the value USERDEFINED may be set and the ObjectType attribute asserted.
IfcControlIndicates project directives issued by the actor.
IfcGroupIndicates groups for which the actor is responsible.
IfcProductIndicates products for which the actor is responsible.
IfcProcessIndicates processes for which the actor is responsible.
IfcResourceIndicates resources for which the actor is responsible.

Table 239 — IfcOccupant Actor Assignment



Concept inheritance

#ConceptModel View
IfcRoot
Software IdentityCommon Use Definitions
Revision ControlCommon Use Definitions
IfcObject
Object Occurrence Predefined TypeCommon Use Definitions
IfcActor
Property Sets for ObjectsCommon Use Definitions
IfcOccupant
Actor AssignmentCommon Use Definitions
Formal representations
XSD Specification
 <xs:element name="IfcOccupant" type="ifc:IfcOccupant" substitutionGroup="ifc:IfcActor" nillable="true"/>
 <xs:complexType name="IfcOccupant">
  <xs:complexContent>
   <xs:extension base="ifc:IfcActor">
    <xs:attribute name="PredefinedType" type="ifc:IfcOccupantTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcOccupant
 SUBTYPE OF (IfcActor);
  PredefinedType : OPTIONAL IfcOccupantTypeEnum;
 WHERE
  WR31 : NOT(PredefinedType = IfcOccupantTypeEnum.USERDEFINED) OR EXISTS(SELF\IfcObject.ObjectType);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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