Re: general purpose filter stylesheet
Thanks Michael, you wrote: [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.] That right that thios would not be to hard, BUT what would XSLT return. I could only specify one node type in my match attribute: a parent of number which is issue. But then I would get the whole issue subtree with ALL articles, EVEN those whose author is NOT 'Date' and the title is NOT 'Database Systems'. But I want my query ONLY to return this part of my XML that make sense to the query. Note: Additional to the query I get information to which supertree an propery as 'author' belongs. (e.g. article) AND I know that there a no two elemet with the same name in my document. That all I know. And I am trying to solve that problem for the last 3 weeks. Is it not possible with XSLT? Do I need XQuery. I even could not find help in your book. S O S !!! ----- Original Message ----- From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Sent: Sunday, March 17, 2002 8:25 PM Subject: RE: general purpose filter stylesheet > > 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 > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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