Export for Layer-based Software

Some software products may require a layer structure to be added to the IFC classification. Revit automatically assigns the layer value according to the default CAD (.dwg/.dgn) mapping file. The default configuration file is: C:\ProgramData\Autodesk\ RVT 20xx\exportlayers-dwg-AIA.txt

The configuration found in this file can be adapted from the Revit UI when selecting Export > Options > Export settings DWG/DXF or manually using the syntax:

<Revit Category Name><tab><tab><Layer Name>

The reference to a custom layer reference file needs to be added to the Revit.ini file which can be found in the following location: C:\Users\<USER>\AppData\Roaming\ Autodesk\Revit\Autodesk Revit 20xx

The full path to the layer reference file is added in the line starting with ExportLayersNameDGN=

For Example: ExportLayersNameDGN=C:\Users\<USER>\Documents\RevitLayers.txt Just like with the class mapping, sometimes it is needed to assign the layer value on the element level. For this, you can use the shared parameter IfcPresentationLayer, which is of course included in the official shared parameter files.