IFC 4.3.0.1 (IFC4X3) development

8.18.3.16 IfcStyledRepresentation

8.18.3.16.1 Semantic 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.

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.

8.18.3.16.2 Entity inheritance

8.18.3.16.3 Attributes

# Attribute Type Description
IfcRepresentation (7)
1 ContextOfItems IfcRepresentationContext

Definition of the representation context for which the different subtypes of representation are valid.

2 RepresentationIdentifier OPTIONAL 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.

LayerAssignments SET [0:?] OF IfcPresentationLayerAssignment FOR AssignedItems

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.

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.

Table 8.18.3.16.A

8.18.3.16.4 Formal propositions

Name Description
OnlyStyledItems

Only IfcStyledItem's (or subtypes) are allowed as members in the list of Items, inherited from IfcRepresentation.

SIZEOF(QUERY(temp <* SELF\IfcRepresentation.Items | 
  (NOT('IFC4X3_DEV_cedaad7e.IFCSTYLEDITEM' IN TYPEOF(temp)))
)) = 0
Table 8.18.3.16.B

8.18.3.16.5 Formal representation

ENTITY IfcStyledRepresentation
 SUBTYPE OF (IfcStyleModel);
 WHERE
	OnlyStyledItems : SIZEOF(QUERY(temp <* SELF\IfcRepresentation.Items | 
  (NOT('IFC4X3_DEV_cedaad7e.IFCSTYLEDITEM' IN TYPEOF(temp)))
)) = 0;
END_ENTITY;

8.18.3.16.6 References

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8.18.3.16.7 Changelog

  • where rule, OnlyStyledItems
  • where rule, WR21