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Re: Equivalence between XSL and XPath expression

2004-12-10 16:59:01
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!


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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