We have the means to define meshes composed of polygons using COLLADA, but we would in the future like to move parts of our art production pipeline over to patches or subdivision surfaces.
Are there any plans to define support in the schema for patches/surfaces?
There has been some discussion of patches and subdivision surfaces. Input from game developers placed emphasis on triangles and polygon meshes, so that is what made it into the current versions of COLLADA.
A subdivision surface discription was under discussion recently but I have not recieved a complete proposal to include the feature in the 1.4 schema. Perhaps someone will submit a proposal soon?