(edited 8/18 to add information)
Attached is an FDK feature file for Minion Pro (2004 revision). The same code should be informative for FontLab and other applications that use the Adobe OpenType feature language.
NOTE: This should only be used as a reference for feature construction, and not for glyph names. The feature file uses "friendly names" which are often changed for final font output.
The main advantage of looking at the original feature file rather than decompiling in FontLab is that any glyph classes retain their original names. FontLab does an amazing job of decompiling features, but it has to invent names for glyph classes, and these are generally less clear than what was originally used in development.
Additionally, this feature file represents the very latest, not-even-released-yet revision to Minion Pro. So it shows our most current thinking in various areas, which may be instructive. Even once this version is shipping, not all users will have it.
Enjoy!
T
Thomas Phinney
Program Mgr
Fonts & Core Technologies
Adobe Systems