CV-2x3-128

IA Title

Based on          IFC2x3

Initiator            ISG Meeting-Dijon

Effects              Extended Coordination View

Date                    2006 11 24

Description:

For the implementation of IfcStandardWall with an associated IfcWallType within the IFC2x3 extended coordination view the following agreements are made:

    * the IfcWallType is supported, but is not mandatory for export

if an IfcWallType is exported for a standard wall, then the following specification on assigning material information to both, the IfcWallStandardCase and the IfcWallType needs to be met.

    * for each IfcWallStandardCase, an IfcMaterialLayerSetUsage is assigned (general rule according to the IFC specification);

    * all wall occurrences being of type IfcWallStandardCase and belonging to one wall type are assigned to one instance of IfcWallType;

    * the IfcMaterialLayerSetUsage's attached to all instances of IfcWallStandardCase belonging to the same IfcWallType shall reference the same instance of IfcMaterialLayerSet;

    * this instance of IfcMaterialLayerSet is assigned to the IfcWallType.


Figures:

CV-2x3-128

Figure 1: The correct assignment of IfcMaterialLayerSetUsage and IfcMaterialLayerSet to IfcWallStandardCase and IfcWallType

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