5.4.3.45 IfcRelAdheresToElement

5.4.3.45.1 Semantic definition

The IfcRelAdheresToElement is an objectified relationship between an element and one to many surface feature elements that adhere to the surface of the element. The relationship is defined to be a 1 to many relationship. The IfcRelAdheresToElement establishes an aggregation relationship between the main element and a sub ordinary surface feature.

The IfcRelAdheresToElement implies a surface interface between the geometric bodies of the element and the surface feature . As with all decomposition relationships it determines:

existence dependency - the RelatedSurfaceFeature cannot exist without the RelatingElement
hierarchical and non-cyclical relationship - the IfcRelAdheresToElement can only alter a single IfcElement
no spatial containment - the IfcSurfaceFeature as related element never participates in the hierarchical spatial containment relationship IfcRelContainedInSpatialStructure

5.4.3.45.2 Entity inheritance

- IfcRoot

5.4.3.45.3 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. NOTE Only the last modification is stored - either as addition, deletion or modification. IFC4-CHANGE 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.
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IfcRelAdheresToElement (2)
5	RelatingElement	IfcElement	Element to which the IfcSurfaceFeature is adhered to.
6	RelatedSurfaceFeatures	SET [1:?] OF IfcSurfaceFeature	The IfcSurfaceFeature(s) that adheres to the surface of the parent element.

Table A

5.4.3.45.4 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.
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Table B

5.4.3.45.5 Formal representation

ENTITY IfcRelAdheresToElement
SUBTYPE OF (IfcRelDecomposes);
RelatingElement : IfcElement;
RelatedSurfaceFeatures : SET [1:?] OF IfcSurfaceFeature;
END_ENTITY;