MIF

from The Free On-line Dictionary of Computing (8 July 2008)

Maker Interchange Format
MIF

   (MIF) A language used to describe a {FrameMaker} document in a
   text file.  MIF is used to exchange information between
   FrameMaker and other applications.

   ["Using FrameMaker 4," Windows and Macintosh Version,
   c. 1986-1993 Frame Technology Corporation].

   (1995-01-30)