IfcConnectionSurfaceGeometry

Semantic definitions at the entity

Entity definition

IfcConnectionSurfaceGeometry is used to describe the geometric constraints that facilitate the physical connection of two objects at a surface or at a face with surface geometry associated. It is envisioned as a control that applies to the element connection relationships.

The IfcSurface (or the IfcFaceSurface with an associated IfcSurface) at the SurfaceOnRelatingElement attribute defines the surface where the basic geometry items of the connected elements connects. The surface geometry and coordinates are provided within the local coordinate system of the RelatingElement, as specified at the IfcRelConnectsSubtype that utilizes the IfcConnectionSurfaceGeometry. Optionally, the same surface geometry and coordinates can also be provided within the local coordinate system of the RelatedElement by using the SurfaceOnRelatedElement attribute.

HISTORY New entity in IFC2x.

IFC2x3 CHANGE The provision of topology with associated geometry, IfcFaceSurface, is enabled by using the IfcSurfaceOrFaceSurface.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	SurfaceOnRelatingElement	IfcSurfaceOrFaceSurface	[1:1]	Surface at which related object is aligned at the relating element, given in the LCS of the relating element.	X
2	SurfaceOnRelatedElement	IfcSurfaceOrFaceSurface	[0:1]	Surface at which the relating element is aligned at the related element, given in the LCS of the related element. If the information is omitted, then the origin of the related element is used.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcConnectionGeometry
IfcConnectionSurfaceGeometry
1	SurfaceOnRelatingElement	IfcSurfaceOrFaceSurface	[1:1]	Surface at which related object is aligned at the relating element, given in the LCS of the relating element.	X
2	SurfaceOnRelatedElement	IfcSurfaceOrFaceSurface	[0:1]	Surface at which the relating element is aligned at the related element, given in the LCS of the related element. If the information is omitted, then the origin of the related element is used.	X

Formal representations

XSD Specification

 <xs:element name="IfcConnectionSurfaceGeometry" type="ifc:IfcConnectionSurfaceGeometry" substitutionGroup="ifc:IfcConnectionGeometry" nillable="true"/>

 <xs:complexType name="IfcConnectionSurfaceGeometry">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="SurfaceOnRelatingElement">

      <xs:complexType>

       <xs:group ref="ifc:IfcSurfaceOrFaceSurface"/>

      </xs:complexType>

     </xs:element>

     <xs:element name="SurfaceOnRelatedElement" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcSurfaceOrFaceSurface"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcConnectionSurfaceGeometry

 SUBTYPE OF (IfcConnectionGeometry);

  SurfaceOnRelatingElement : IfcSurfaceOrFaceSurface;

  SurfaceOnRelatedElement : OPTIONAL IfcSurfaceOrFaceSurface;

END_ENTITY;

 EXPRESS-G diagram

	Flächige Verbindung - Geometrie
	Connection Surface Geometry