Not sure if that makes any more sense than the original post - ho, hum.
Yep, it does. Now I got the picture. Sounds good!
Maybe somebody (yeah, project leader, where are you ) could make some diagrams/ figures describing the whole architecture so far. This is probably quite useful. Then we can all work on it till we (or the leaders ) fix the concept and the real work starts...
A specification about how to store the meshes including materials and other scene data like lightsources and also animations, effects etc. in the xml format has to be done as well.
Also: what we need then is some importer/exporter to get the meshes from a modelling tool's format into ours (I remember Blender was mentioned to model stuff, right?).