This is not a complete answer to your question, but removing the xmlns notation allows your queries to work just fine (once you fix the issues with the single quotes INSIDE the xml declaration).
Edit: the Namespace declaration must be wrong, since trying to retrieve that pulls a 404 error for me....
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Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?