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On Thu, 12 Jun 2003, Bob Foster wrote:
> Seems to me closure questions should be grounded in regular hedge (not
> regular tree) grammars, as the output sequences of XPath/XQuery are, in
> fact, hedges. I believe MURATA Makato has explored this territory (trees +
> queries = hedges).
This is very true, I think when we talk about operations, we are speaking
about hedges and not trees. I am familiar with hedges, and I was speaking
in terms of hedges only.. cheers and regards - murali.