CV-2x3-116 (aka CV-06-116)

No use of subtypes of IfcStyledItem for assigning presentation information 

Based on          IFC2x3

Initiator            ISG Teleconference

Effects              Extended Coordination View

Date                    2006 03 07

Description:

When assigning presentation information, i.e. subtypes of IfcPresentationStyle, [added 05-May-06] for annotations, proxies and other explicit geometric representation items, then the link between the presentation and the geometry or material definition shall always been made by

    * IfcStyledItem

not by its subtypes:

    * IfcAnnotationTextOccurrence, IfcAnnotationSymbolOccurrence, IfcAnnotationCurveOccurrence, IfcAnnotationFillAreaOccurrence, IfcAnnotationSurfaceOccurrence 

It may be expected that those paper space specific subtypes are marked deprecated in future releases of IFC.

2006-03-09 Important Note

    * the agreement should be seen as being preliminary - there might be changes, e.g. for IfcAnnotationFillAreaOccurrence when used for material definition representations, due to the fact that the attribute GlobalOrLocal is needed to differentiate between hatching that rotates with the object coordinate system, and hatching that is always the same.

2010-09-23 Important Note

    * the subtypes IfcAnnotationTextOccurrence, IfcAnnotationSymbolOccurrence, IfcAnnotationCurveOccurrence, IfcAnnotationFillAreaOccurrence, IfcAnnotationSurfaceOccurrence shall not be used, there are out of scope of the IFC2x3 Coordination View Version 2.0 and are deprecated for the next IFC release IFC2x4.


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