#57 rationalise typing of att.segLike elements

[Lou Burnard]

The members of att.segLike (cl, c, m, phr, seg, s, w) all inherit their @type attribute from that class, rather than from att.typed. Consequently they don't behave like other typed attributes, eg they don't have a @subtype attribute (except for seg, which adds it
explicitly) This seems confusing and inconsistent. I propose to remove the @type attribute from att.segLike, remove @subtype from seg, and add all these elements to the att.typed class.(Another solution might be to make att.segLike a child of att.typed, but I prefer the more
explicit one suggested here)

[Sebastian Rahtz]

at first sight it seems plausible, but I'd want to be reassured that
there was not a sound reason for this originally. I think this should
be referred back to the TEI Council for discussion. Its not urgent, after all.

[Lou Burnard]

All subsequent discussion on council list supports the proposal; implemented in rev 4853