When exporting a project to another format (such as DWG or DGN), you want the exported file to contain as much information about the project as possible. Vasari stores a wealth of project information in its categories and subcategories. In CAD software, this type of information is stored in layers (or levels in MicroStation). To ensure that information about Revit categories is properly converted to CAD layer names, use the Export Layers tool to define a layer mapping file.
Format specific exporting options can be found in the following topics:
The layer mapping file is a text file that maps each Revit category or subcategory to a preconfigured layer name for the CAD software. For example, a Revit door object automatically maps to A-DOOR layer in AutoCAD. The layer names are preconfigured in the text file, but you can change them.
You can load an existing layer mapping file and manually change values for it, or you can generate a file using any of the following mapping standards:
When you use the Export Layers tool to generate a layer mapping file, by default the file is named as follows:
exportlayers-<format>-<standard>.txt
where <format> is DWG or DGN (to indicate the selected export format), and <standard> reflects the selected Export Layers standard (such as AIA or BS1192).
The layer mapping file resides in C:\Documents and Settings\All Users\Application Data\Autodesk\<product>. (For Windows® Vista and Windows 7, the layer mapping file location is C:\ProgramData\Autodesk\<product>.) When you export a project, its layer mapping file is exported (along with the project) into the appropriate format for the target CAD program.