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RE: Equivalence between XSL and XPath expression

2004-12-10 17:26:20

How can the XPath return 0, if has a context node (.) and has 
the self 
axis in ancestor-or-self? This way it has to return at least 1!

I think you are assuming the context node is a menu element. There's no
reason to assume that. If the context node is the root (document) node (for
example) the XPath expression will return 0.

Michael Kay
http://www.saxonica.com/


Michael Kay wrote:

And the question is: Is this XPath expression

count(./ancestor-or-self::menu)+count(./preceding::menu)

equivalent to this XSL expression?

           <xsl:variable name="position">
                   <xsl:number level='any' count="menu"/>
           </xsl:variable>

   


Almost. xsl:number will never return 0, but the XPath 
expression might. Take
a look at the XSLT 2.0 spec which defines xsl:number in 
terms of equivalent
XPath expressions.

Michael Kay
http://www.saxonica.com/


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