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RE: understanding generate-id and node-equality [XSLT

Subject: RE: understanding generate-id and node-equality [XSLT 1.0, Saxon 6.5.5]
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Fri, 15 Aug 2008 20:26:32 +0100
RE:  understanding generate-id  and node-equality [XSLT
> using XSLT 1.0 and Saxon 6.5.5 I'm wondering whats the actual 
> difference between
> <xsl:key name="child-key" match="child" use="parent::*"/>

That indexes an element on the string-value of its parent node, which
doesn't sound a very useful thing to do.
> <xsl:template match="parent" >
>         <xsl:variable name="childs" select="key('child-key', 
> parent::*)"/>
>         ...
> </xsl:template>
> and
> <xsl:key name="child-key" match="child" 
> use="generate-id(parent::*)" />

This effectively indexes an element on the identity of its parent node -
which doesn't sound very useful either.

Michael Kay

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