[PLS] Homograph discrimination by @role OK

* References:
Current last call draft:
http://www.w3.org/TR/2006/WD-pronunciation-lexicon-20061026/
Earlier comment/resolution:
http://www.w3.org/TR/2006/WD-pronunciation-lexicon-20061026/pls-disp.html#R102

*PFWG response:

Thank you for adding the @role attribute.  We believe that this will 
afford the capability
we need.  We accept the disposition of this comment as realized in the current
2nd Last Call.

Al Gilman
/chair, PFWG