mtype in mrk in XLIFF mapping

Hi all (expecially Yves),

We're wrapping up the WICS project and I want to get out my last questions
before finishing.

I was wondering about the use of mtype="x-its" in the XLIFF mapping. Should
any <mrk> element that is added in order to carry over ITS information
always have it unless a different mtype like "seg" is required?

Nathan