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Update BIM Specifications.md

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Yorik van Havre 2016-07-04 11:51:52 -03:00 committed by GitHub
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BIM Specifications.md
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@ -16,13 +16,13 @@ The correct implementation of these rules implies a good understanding of the [I
Objects should have a name that allows a human being to understand what it is, in case the software that reads the IFC file fails to recognize or categorize it appropriately. For example, bad names are "Object00014", "Material43". Good names are "Kitchen chair", "Grey concrete", "East living room wall"
All IFC objects have a **Name** and a **Description**. Any of them can be used for this purpose.
All [IFC objects](http://www.buildingsmart-tech.org/ifc/IFC4x1/html/schema/ifckernel/lexical/ifcroot.htm) have a **Name** and a **Description**. Any of them can be used for this purpose.
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.
| Platform |Native Functionality| Import | Export |
| ------------------------ | ------ | ------ | ------ |
| FreeCAD |???| IFC name translated to FreeCAD object **name** ```('My test wall')```, IFC **description** ```('This is a test wall to check rule number one')``` imported into FreeCAD object description if available | FreeCAD object name exported as IFC name, FreeCAD object description, if present, exported as IFC description |
| FreeCAD |[Label property](http://www.freecadweb.org/wiki/index.php?title=Property_editor) (all FreeCAD objects), Description property (only [Arch objects](http://www.freecadweb.org/wiki/index.php?title=Arch_Module))| IFC name translated to FreeCAD object **label** ```('My test wall')```, IFC **description** ```('This is a test wall to check rule number one')``` imported into FreeCAD object description if available | FreeCAD object label exported as IFC name, FreeCAD object description, if present, exported as IFC description |
| Revit |???|Upon import, **name** and **description** is not accessible to modify from Revit UI. see Screenshots [1](Specifications test files/wall_with_name_and_description/Revit Properties_1.png) & [2](Specifications test files/wall_with_name_and_description/Revit Properties_2.png) | **Name** and **description** exports out correctly. |
Test folder: [wall_with_name_and_description](Specifications test files/wall_with_name_and_description)
@ -33,7 +33,7 @@ Grouping objects using [IfcGroups](http://www.buildingsmart-tech.org/ifc/IFC4x1/
| Platform |Native Functionality| 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 (**Problem**: IfcGroups cannot be nested into IfcBuildingStoreys) |
| FreeCAD |[Groups](http://www.freecadweb.org/wiki/index.php?title=Group)| 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 |[Groups of Elements](https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Revit-Model/files/GUID-52612B0F-43AA-47AF-A76C-BB0E3DD24E34-htm.html)| Does not import IFCgroups into Revit Groups | Yes, exports ```#253= IFCGROUP('2wfBgyl9H71872FVeaZPs0',#41,'Model Group:Test Revit Group:149951',$,'Model Group:Test Revit Group');``` |
Test folder: [wall_in_nested_groups](Specifications test files/wall_in_nested_groups)