Re: EMF - Definition
If that file contains information (e.g. technical data sheets for various components) that would be either unnecessary or even confusing to the production folks using a BOM file, then it would make sense to keep a different file with that additional info.
I've personally never encountered that specific file name, but that doesn't make it wrong. The term used to identify it is almost irrelevant, though. It could be called guacamole for all that matters, so long as everyone understand what it means.