What goes around....
I thought Microsoft were in the camp that thought software patents were good for the industry?? It's kind of Ironic that they get stung with an XML patent shortly after being issued with their own pointless, unintuitive, farcical XML patent: "Word-processing document stored in a single XML file that may be manipulated by applications that understand XML".
So they used XML for defining a method to use and store data.... How ingenious, I bet no one has ever used XML to do that before. <expletive deleted>!