Specialization tool discussed in last meeting

In the last LW DITA SC meeting on 2 Nov, a tool for doing a simple
specializations was discussed. I think it was Michael Priestley who
mentioned a few characteristics that this tool should have. If that was
you, Michael, can I get you to list them again? I neglected to write
them down.
Thanks, Mark Giffin Mark Giffin Consulting, Inc.  http://markgiffin.com/