Re:This is not proof of OOXML being defective by d (Score 4, Insightful)

But that's still a problem. Microsoft's implementation becomes the de facto standard and all others must (attempt to) conform to the behavior of that implementation or be judged defective. This is what happened when MS published the MAPI (Mail API) spec and then released an implementation alongside it. Lotus and others could never fully mimic what the MS implementation did, so they eventually languished.