Re: XQuery: is FLWR a <xsl:foreach/> ?
On Sat, 24 Feb 2001 Jonathan Robie wrote: >If you want us to use XSLT syntax directly in favor of our FLWR >expressions, I need to know the answers to questions like these: > >1. What are the equivalences that can be exploited for query optimization? >2. What are the typing rules for the possible <xsl:foreach/> constructs? >3. How are the various possible <xsl:foreach/> constructs translated into >SQL? (fill in your favorite environment in place of SQL) > >Do you know of any good work in these areas? Please don't ask me to do it >myself, or ask for proof that it can not be done. If we want a solution in >a reasonable amount of time, we should build on work that exists. These are tasks the XML Query WG can and should perform, perhaps in conjunction with the XSLT WG. I expect the equivalences will be of a similar nature, typically XPath rewriting. As we have mentioned, schema analysis may drive this process - as it usually does for SQL.
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