for personal purpose, i tried passing pyxb-1.1.4 to Cython,
then, Cython rejects some your codes.
plase see atached for details.
i know keeping up pyxb as pure python is signigicant especially for Jython, etc, so i would not request to make pyxb to c-ish ;-) i'm just evaluating Cython itself now rathar than pyxb. (incidentally, simply compiling ``binding`` modules (except datatypes_facets) with cython, my experimental script took 33% speedup .)