Hi Spot,
you will probably remember that you were checking the OpenCascade Public
License few moth ago. Now the question about its free/nonfree status was
opened on the upstream forum and it would be a good chance to express
our (or better RH Legal's) reasons that led to the decision that it is
non-free and possibly make upstream to resolve them.
I am including the mail I got from Debian packagers.
URL of the discussion is
http://www.opencascade.org/org/forum/thread_15859/
related Review Request is
https://bugzilla.redhat.com/show_bug.cgi?id=458974
Dan