DR 11-0021 ? WML: Support for DrawingML inadequately specified

[MURATA Makoto]

I created a svn branch for Part1 schemas for this DR.

https://subversion.assembla.com/svn/IS29500/branches/Part1DR-11-0021

sml.xsd, sml.rnc, dml-wordprocessingDrawing.xsd,
dml-wordprocessingDrawing.rnc have been changed.

Regards,
Makoto