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Update BIM Specifications.md 

* Updated FreeCAD handling of description field
* Added IfcGroup problem description
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Yorik van Havre 2016-06-14 19:33:08 -03:00 committed by GitHub
parent 989e96b283
commit b7bcf459b2
1 changed files with 3 additions and 3 deletions
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BIM Specifications.md
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@ -18,11 +18,11 @@ Objects should have a name that allows a human being to understand what it is, i
All IFC objects have a **Name** and a **Description**. Any of them can be used for this purpose.
This rules mainly applies to [IfcProduct](http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifckernel/lexical/ifcproduct.htm) entities in IFC: They are the final, individual objects that compose a building. For example, a wall, a column, a chair, a window. It doesn't consider objects that are part of a final product, when they are composed of multiple objects, for example a leg of a chair or a brick of a wall. It is sufficient to have the chair correctly named, not necessarily each component of the chair.
This rule mainly applies to [IfcProduct](http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifckernel/lexical/ifcproduct.htm) entities in IFC: They are the final, individual objects that compose a building. For example, a wall, a column, a chair, a window. It doesn't consider objects that are part of a final product, when they are composed of multiple objects, for example a leg of a chair or a brick of a wall. It is sufficient to have the chair correctly named, not necessarily each component of the chair.
| Support | Import | Export |
| ------------------------ | ------ | ------ |
| FreeCAD | IFC name translated to FreeCAD object name, IFC description not imported into FreeCAD | FreeCAD object name exported as IFC name, FreeCAD object description, if present, exported as IFC description |
| FreeCAD | IFC name translated to FreeCAD object name, IFC description imported into FreeCAD object description if available | FreeCAD object name exported as IFC name, FreeCAD object description, if present, exported as IFC description |
| Revit | | |
Test file: [wall_with_name_and_description.ifc](Specifications test files/wall_with_name_and_description.ifc)
@ -33,7 +33,7 @@ Grouping objects using [IfcGroups](http://www.buildingsmart-tech.org/ifc/IFC4x1/
| Support | Import | Export |
| ------------------------ | ------ | ------ |
| FreeCAD | IFC groups translated to FreeCAD groups. Nesting is respected. | FreeCAD groups are exported to IFC groups, but groups are not part of IfcBuildingStoreys. |
| FreeCAD | IFC groups translated to FreeCAD groups. Nesting is respected. | FreeCAD groups are exported to IFC groups, but groups are not part of IfcBuildingStoreys (**Problem**: IfcGroups cannot be nested into IfcBuildingStoreys) |
| Revit | | |
Test file: [wall_in_nested_groups.ifc](Specifications test files/wall_in_nested_groups.ifc)