Default manufacturer's part number field in KiCad libraries

I made a request for comment on the KiCad dev mailing list to and a standard MPN field: https://lists.launchpad.net/kicad-developers/msg27021.html

Dammit! I wish I’d seen this 6 months ago. Its just what I’ve been looking for - a way to globally add fields to my projects! It nicely renders the need for default fields in the library moot.
BUT - it would be good to have a community wide naming convention for common fields, to facilitate the creation of add-on scripts for BOM handling, etc.
(And I want to offer a huge thankyou to those people writing and publishing their scripts.)