Subject: RE: [xsl] general purpose filter stylesheet From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Sun, 17 Mar 2002 19:25:39 -0000 |
> How can I do this query resolving with XSLT? > (I need this for an java xml wrapper, that can submit queries > to given docs > without knowing a lot of their structure) > > My query is an boolean expression: > ########################### > > ((author='Date' or title='Database Systems') and number='1') > PROBLEM: 'number' is not part of the same parent as 'author' > You seem to have invented your own query language. If you want this to work when "number" and "author" are not siblings, then you're assuming some semantics that are different from the XPath semantics. If you want to invent your own query language, then you will have to define its syntax and semantics, and write a translator that converts it into an XPath expression. You can then pass the resulting XPath expression to a suitable dynamic XPath execution engine - for example the xx:evaluate() function in Saxon or Xalan. I don't know what the intended semantics of your expression are. Perhaps it's equivalent to the XPath expression ((//author='Date' or //title='Database Systems') and //number='1') in which case doing the translation into XPath might not be too difficult. Michael Kay Software AG home: Michael.H.Kay@xxxxxxxxxxxx work: Michael.Kay@xxxxxxxxxxxxxx XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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