IfcStyledRepresentation

Semantic definitions at the entity

Entity definition

The IfcStyledRepresentation represents the concept of a styled presentation being a representation of a product or a product component, like material. within a representation context. This representation context does not need to be (but may be) a geometric representation context.

NOTE Current usage of IfcStyledRepresentation is restricted to the assignment of presentation information to an material. The IfcStyledRepresentation includes only presentation styles (IfcCurveStyle, FillAreaStyle, IfcSurfaceStyle) that define how a material should be presented within a particular (eventually view and scale dependent) representation context. All instances of IfcStyledRepresentation are referenced by IfcMaterialDefinitionRepresentation, and assigned to IfcMaterial by IfcMaterialDefinitionRepresentation.RepresentedMaterial.

A styled representation has to include one or several styled items with the associated style information (curve, symbol, text, fill area, or surface styles). It shall not contain the geometric representation items that are styled.

HISTORY New entity in IFC2x2.

Formal Propositions

Rule	Description
OnlyStyledItems	Only IfcStyledItem's (or subtypes) are allowed as members in the list of Items, inherited from IfcRepresentation. IFC2x3 CHANGE New where rule to ensure the usage for material definition representations, and other non-shape representations

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRepresentation
1	ContextOfItems	IfcRepresentationContext	[1:1]	Definition of the representation context for which the different subtypes of representation are valid.	X
2	RepresentationIdentifier	IfcLabel	[0:1]	The optional identifier of the representation as used within a project.	X
3	RepresentationType	IfcLabel	[0:1]	The description of the type of a representation context. The representation type defines the type of geometry or topology used for representing the product representation. More information is given at the subtypes IfcShapeRepresentation and IfcTopologyRepresentation. The supported values for context type are to be specified by implementers agreements.	X
4	Items	IfcRepresentationItem	S[1:?]	Set of geometric representation items that are defined for this representation.	X
	RepresentationMap	IfcRepresentationMap @MappedRepresentation	S[0:1]	Use of the representation within an IfcRepresentationMap. If used, this IfcRepresentation may be assigned to many representations as one of its Items using an IfcMappedItem. Using IfcRepresentationMap is the way to share one representation (often of type IfcShapeRepresentation) by many products.	X
	LayerAssignments	IfcPresentationLayerAssignment @AssignedItems	S[0:?]	Assignment of the whole representation to a single or multiple layer(s). The LayerAssigments can be overridden by LayerAssigments of the IfcRepresentationItem's within the list of Items. NOTE Implementation agreements can restrict the maximum number of layer assignments to 1.	X
	OfProductRepresentation	IfcProductRepresentation @Representations	S[0:?]	Reference to the product representations to which this individual representation applies. In most cases it is the reference to one or many product shapes, to which this shape representation is applicable.	X
IfcStyleModel
IfcStyledRepresentation

Formal representations

XSD Specification

 <xs:element name="IfcStyledRepresentation" type="ifc:IfcStyledRepresentation" substitutionGroup="ifc:IfcStyleModel" nillable="true"/>

 <xs:complexType name="IfcStyledRepresentation">

  <xs:complexContent>

   <xs:extension base="ifc:IfcStyleModel"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcStyledRepresentation

 SUBTYPE OF (IfcStyleModel);

 WHERE

  OnlyStyledItems : SIZEOF(QUERY(temp <* SELF\IfcRepresentation.Items | 
  (NOT('IFCPRESENTATIONAPPEARANCERESOURCE.IFCSTYLEDITEM' IN TYPEOF(temp)))
)) = 0;
END_ENTITY;

 EXPRESS-G diagram

	Repräsentation mit Stilinformationen
	Styled Representation