IFC 4.3.0.1 (IFC4X3_TC1)

5.1.3.36 IfcRelDefines

ABSTRACT This definition may not be instantiated

5.1.3.36.1 Semantic definition

A generic and abstract relationship which subtypes are used to:

  • assign a 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,

3 Name 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.

4 Description OPTIONAL IfcText

Optional description, provided for exchanging informative comments.

Table 5.1.3.36.A

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 provide for a name and a description about the concept.

Click to show 2 hidden inherited concepts Click to hide 2 inherited concepts
Table 5.1.3.36.B

5.1.3.36.5 Formal representation

ENTITY IfcRelDefines
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcRelDefinesByObject
	,IfcRelDefinesByProperties
	,IfcRelDefinesByTemplate
	,IfcRelDefinesByType))
 SUBTYPE OF (IfcRelationship);
END_ENTITY;

5.1.3.36.6 References

5.1.3.36.7 Changelog

5.1.3.36.7.1 IFC4

  • attribute, RelatedObjects