IFC 4.3.x development

8.18.3.15 IfcStyleModel

8.18.3.15.1 Semantic definitions at the entity

IfcStyleModel represents the concept of a particular presentation style defined for a material (or other characteristic) of a product or a product component within a representation context. This representation context may (but has not to be) a geometric representation context.

IfcStyleModel can be a style representation (presentation style) of a material (via IfcMaterialDefinitionRepresentation), potentially differentiated for different representation contexts (for example, different material hatching depending on the scale of the target representation context).

HISTORY  New entity in IFC2x3.

# Attribute Type Description
IfcRepresentation
1 ContextOfItems IfcRepresentationContext Definition of the representation context for which the different subtypes of representation are valid.
2 RepresentationIdentifierOPTIONAL IfcLabel The optional identifier of the representation as used within a project.
3 RepresentationType OPTIONAL IfcLabel 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.
4 Items SET [1:?] OF IfcRepresentationItem Set of geometric representation items that are defined for this representation.
RepresentationMap SET [0:1] OF IfcRepresentationMap FOR MappedRepresentation 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.

> IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added
LayerAssignments SET [0:?] OF IfcPresentationLayerAssignment FOR AssignedItemsAssignment 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.

> IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added
OfProductRepresentation SET [0:?] OF IfcProductRepresentation FOR Representations 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.

> IFC4 CHANGE Inverse relationship cardinality relaxed to be 0:N.

8.18.3.15.1 Entity inheritance

dot_inheritance IfcStyledRepresentation IfcStyledRepresentation IfcStyleModel IfcStyleModel IfcStyledRepresentation->IfcStyleModel IfcRepresentation IfcRepresentation IfcStyleModel->IfcRepresentation IfcShapeModel IfcShapeModel IfcShapeModel->IfcRepresentation

8.18.3.15.2 Formal representations

ENTITY IfcStyleModel
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcStyledRepresentation))
 SUBTYPE OF (IfcRepresentation);
END_ENTITY;