I think it would make a lot more sense to just change the poser file structure to actually add meta-data, possibly in xml. Things like a canonical name for a figure or prop, so that any material collections created for it could include it as metadata. For the cases of character (clothing) or props what figures they fit. (A4, S4 etc.) By using xml you aren't limited to just single values, you can have lists. If the metadata is kept in an auxiliary file, then it can be generated for existing products, and the products will still be usable for previous versions of poser.