At http://www.w3.org/TR/xhtml-modularization/abstract_modules.html#s_bdomodule , the attribute listed as Core mistakenly links to "Common". Also, "bdo" should allow "xml:lang" per the DTD.
Also, while XHTML does have facilities already for expressing xml:base and xml:id, would these be reasonable to include in the Core attribute collection? (I wouldn't use them myself, nor would anybody need them, but since they are general purpose for XML...).
Brett
