Represent 3D shapes from OOXML in ODF ?

[Regina Henschel <regina.henschel@libreoffice.org>]

Hello members of the TC,

if a 3D shape is read from OOXML by an import filter, it is currently 
not possible to store all of its properties to ODF.
Some questions:

(A)
Is it possible to extend ODF so that the OOXML information can be used 
directly? Would it make sense to extend the standard in this respect?

(B)
A custom shape (10.6.1) has the attributes draw:engine (19.146) and 
draw:data (19.131). Would it fit to the desired purpose of these 
attributes, to use them to store such OOXML information?

(C)
Do you have a suggestion, how to preserve the OOXML properties in ODF?

Kind regards,
Regina