The Unified Font Object (UFO) is a cross-platform, cross-application, human readable, future proof format for storing font data.

The UFO Design Philosophy

Versions

UFO 1 Published in 2004.
UFO 2 Published in March 2009.
UFO 3 Published in March 2012.

Download

The source for the documentation, an issue tracker and more are located at https://github.com/unified-font-object/ufo-spec.