IfcRelAdheresToElement

Item	SPF	XML	Change	Description
IFC4x3_RC3 to IFC4x3_RC4
IfcRelAdheresToElement			ADDED

Semantic definitions at the entity

Entity 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.

NOTE In contrary the IfcRelAggregates relationship establishs an aggregation of equal parts to a whole.

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 hiearchical spatial containment relationship IfcRelContainedInSpatialStructure

HISTORY New entity in IFC4x3.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
5	RelatingElement	IfcElement		Element to which the IfcSurfaceFeature is adhered to.	X
6	RelatedSurfaceFeatures	IfcSurfaceFeature	S[1:?]	The IfcSurfaceFeature(s) that adheres to the surface of the parent element.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRoot
1	GlobalId	IfcGloballyUniqueId		Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	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 in stored - either as addition, deletion or modification. IFC4 CHANGE The attribute has been changed to be OPTIONAL.	X
3	Name	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.	X
4	Description	IfcText	?	Optional description, provided for exchanging informative comments.	X
IfcRelationship
IfcRelDecomposes
IfcRelAdheresToElement
5	RelatingElement	IfcElement		Element to which the IfcSurfaceFeature is adhered to.	X
6	RelatedSurfaceFeatures	IfcSurfaceFeature	S[1:?]	The IfcSurfaceFeature(s) that adheres to the surface of the parent element.	X

#	Concept	Template	Model View
IfcRoot
	Identity	Software Identity	General Usage
	Revision Control	Revision Control	General Usage

Formal representations

XML Specification

 <xs:element name="IfcRelAdheresToElement" type="ifc:IfcRelAdheresToElement" substitutionGroup="ifc:IfcRelDecomposes" nillable="true"/>

 <xs:complexType name="IfcRelAdheresToElement">

  <xs:complexContent>

   <xs:extension base="ifc:IfcRelDecomposes">

    <xs:sequence>

     <xs:element name="RelatedSurfaceFeatures">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcSurfaceFeature" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcSurfaceFeature"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelAdheresToElement

 SUBTYPE OF (IfcRelDecomposes);

  RelatingElement : IfcElement;

  RelatedSurfaceFeatures : SET [1:?] OF IfcSurfaceFeature;

END_ENTITY;

 EXPRESS-G diagram

IfcRelAdheresToElement

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to General Usage

Formal representations