DR 09-0216: WML: Custom XML and Smart Tags

[MURATA Makoto (FAMILY Given)]

Re: "The distinction between custom XML markup and smart tags is that
custom XML markup is based on a specified schema, which shall be
specified using the attachedSchema element (17.15.1.5). "

It is not clear to me whether custom XML markup is required to be 
valid, it should be valid, or it may be valid.  In other words, 
if a custom XML markup specified an invalid document, is the 
containing OOXML document non-conformant?  Rex, if you think 
that this is a sensible question, could you submit a DR on behalf 
of WG4?

Cheers,
Makoto