5.1.3.36 IfcRelDefines
ABSTRACT This definition may not be instantiated
5.1.3.36.1 Semantic definition
IfcRelDefines is a generic and abstract relationship which subtypes are used to:
- assign an object type to an object occurrence
- assign a property set to an object instance
- assign a property set template to a property set
5.1.3.36.2 Entity inheritance
5.1.3.36.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcRoot (4) | |||
| 1 | GlobalId | IfcGloballyUniqueId |
Assignment of a globally unique identifier within the entire software world. |
| 2 | OwnerHistory | 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. Only the last modification is stored - either as addition, deletion or modification. The attribute has been changed to be OPTIONAL. |
| 3 | Name | OPTIONAL IfcLabel |
An 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. |
| 4 | Description | OPTIONAL IfcText |
An optional description, provided to exchange informative comments. |
5.1.3.36.4 Concept usage
| Concept | Usage | Description | |
|---|---|---|---|
| IfcRoot (2) | |||
| Revision Control | General |
Ownership, history, and merge state is captured using IfcOwnerHistory. |
|
| Software Identity | General |
IfcRoot assigns the globally unique ID. In addition, it may also provide a name and description for the concept. |
|
| Click to show 2 hidden inherited concepts Click to hide 2 inherited concepts | |||
5.1.3.36.5 Formal representation
ENTITY IfcRelDefines
ABSTRACT SUPERTYPE OF (ONEOF
(IfcRelDefinesByObject
,IfcRelDefinesByProperties
,IfcRelDefinesByTemplate
,IfcRelDefinesByType))
SUBTYPE OF (IfcRelationship);
END_ENTITY;