DR 09-0210: WML: Custom XML and Smart Tags

[MURATA Makoto (FAMILY Given)]

Shawn Villaron wrote:
> What's the migration story for files which pre-date 29500? 

I have assumed that the migration without loss of information is not
always possible.   Is the transformation from VML to DrawingML always
possible without loss of information?  Can all features in Part 4 be 
converted to Part 1 always?  For this particular case, I certainly do 
not want to allow sick cases forever. 


Cheers,
Makoto