By Adam Nagy
A question came up about how to tell in a DXF file exported from a Flat Pattern if a hole is tapped or not.
Usually the API just automates what the UI provides. However, in case of exporting a flat patterm, a specific attribute can be added to an edge to place it on a different layer:
http://modthemachine.typepad.com/my_weblog/2009/04/controlling-layers-in-your-flat-pattern-export.html
So you could put the edges of tapped holes on different layers in order to flag them.
Another option would be to create a drawing view from the flat pattern, add annotations to the various holes, and export that drawing to DXF.