Adding simple mechanic tags as a recommendation to standard

[Roland Melkert]

I see,

The rotation center could (should) be part of the groups it self. Leaving the relations between group to a new (set of) meta's.

maybe something like

0 !JOINT [name=main] [group=someGrpId]
0 !JOINT [name=arm] [group=someOtherGrpId] [parent=main] [from=0 0 0 1 0 0 0 1 0 0 0 1] [to=0 0 0 1 0 0 0 1 0 0 0 1] [rotVec=0 0 1] [rotLimits=-30 30]
etc

This is basically how I did things in LD4DStudio but instead of groups it used submodels and the info was stores in xml not the ldraw file it self.