[biological_process] cartilage development <sep> chondroitin sulfate biosynthetic process <sep> chondroitin sulfate proteoglycan biosynthetic process <sep> D-xylose metabolic process <sep> extracellular matrix organization <sep> heparan sulfate proteoglycan biosynthetic process <sep> ossification <sep> proteoglycan biosynthetic process <sep> UDP-D-xylose biosynthetic process