Bringing attributes draw:fontwork-xyz to ODF?

Hi all,

LibreOffice has a feature Fontwork, which is actually a "text along 
path". This feature exists from the beginning. You find it in the DTD of 
OpenOffice.org 1.0.

When OpenOffice.org had switched to ODF, these attributes were written 
unchanged to file and so does LibreOffice. But these attributes were 
never specified in ODF.

I have started to work on a specification. But before I continue to work 
on it, I think, there should be a general decision: Do we want to 
specify these attributes, or do we change the implementation to write 
these attributes in loext-namespace for ever and drop it for ODF strict? 
Or any other suggestion?

Kind regards
Regina