To Jonathan Robie et al..
Regarding XQuery and the so-called efficiency provided by 1-unambiguous grammars -- after thinking about it for some time.. I believe that the efficiency provided by 1-unambiguous grammars is w.r.to schema operations, and what we have lost is efficiency for further data operations on the result of one operation. I would conjecture that the loss of efficiency will outweigh any gains by a huge margin.. this loss of efficiency will reflect in normal day to day operations, which more than 80% of the people will require. The above is again a conjecture at this point of time, and I will try to prove it. cheers and regards - murali. note: I am going to harp only on the issue of 1-unambiguity. Makoto gave lots of other cases..
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