The Lesson

*/xml doesn't mean what many think it means.

Can it be fixed?

Maybe. Need to convince editors of RFC 3023bis (C.Lilley, M.Makoto) and IESG.

Maybe not. Does "+xml" intent of "generic processing behaviour" include namespace dispatch? Need to check all +xml types to confirm such a change won't break anything.

If not ...

W3C Working Groups engaged in defining a language SHOULD arrange for the registration of an Internet Media Type [...] for that language

-- an old version of the TAG finding on Media Type registration