IfcGroup

IfcGroup

Definition from IAI: The IfcGroup is an generalization of any arbitrary group. A group is a collection of objects, which do not have any particular positioning relationship. Therefore a group is an aggregation under some non-geometrical/topological grouping aspects.

EXAMPLE An example for a group is the system, since it groups elements under the aspect of their role, regardless of their position in a building.

A group can hold any collection of products, processes, controls, resources, actors or other groups. Thus groups can be nested.

HISTORY New entity in IFC Release 1.0.

EXPRESS specification:

ENTITY IfcGroup

SUBTYPE OF (

IfcObject);

INVERSE

IsGroupedBy

IfcRelAssignsToGroup FOR RelatingGroup;

END_ENTITY;

Attribute definitions:

IsGroupedBy

Contains the relationship that assigns the group members to the group object.

Inheritance graph

ENTITY IfcGroup;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

ENTITY IfcGroup;

INVERSE

IsGroupedBy

IfcRelAssignsToGroup FOR RelatingGroup;

END_ENTITY;