Missing default values for dr3d objects, when attribute is optional

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

Hi all,

I have noticed, that for dr3d objects, for example dr3d:sphere, their 
attributes are optional. But when this attributes are missing, then 
neither size nor position of the object is known. Even when a unit size 
1.0 is assumed, both a position ranges [-0.5;0.5] or [0.0;1.0] make 
sense. Do you agree, that the specification should give a default value 
at least for those attributes, that determine size and position? Or 
should those attributes be changed to be mandantory; is that possible at 
all?

Kind regards
Regina