RE: Can keys go out of scope?

key() always selects nodes in the document containing the context node. You
problem is probably that you are calling it at a point where the context
node is in a different document (or temporary tree).

Usual circumvention (in XSLT 1.0) is

(a) define a global variable
<xsl:variable name="root" select="/"/>

(b) use key() within a for-each:

<xsl:for-each select="$root">
  <xsl:.... select="key('a', 'b')"
</xsl:for-each>

With XPath 2.0 you can write

<xsl:.... select="$root/key('a', 'b')"

to switch documents.

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of
> TSchutzerWeissmann@xxxxxxxxxxxxxxxx
> Sent: 01 March 2002 18:19
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Can keys go out of scope?
>
>
> I know keys can't go out of scope, I just want to know why
> I'm having to do
> this:
>
>  <xsl:template match="Billcode">
>    <xsl:variable name="current" select="."/>
>    <xsl:apply-templates
>      select="$template/sc:static/*" mode="static">
>      <xsl:with-param name="current" select="$current"/>
>      <xsl:with-param name="score"
> select="key('scores',@ScoreRef)"/>     #I
> shouldn't need to do this
>     </xsl:apply-templates>
>  </xsl:template>
>
>
> The key only gets used at the other end of some chained
> templates, and I
> would have hoped to be able to do this:
> <xsl:value-of select="key('scores',$current/@ScoreRef)"/>,
>
> given that I'm passing the Billcode element down the chain in
> the $current
> parameter. I've been through this n times, it even works on a
> different
> stylesheet. I've tested the value of $current/@ScoreRef at
> every step of the
> way, and it's what it was in the first template shown above.
> Any idea what's
> going on (or, (@~!#  as Captain Haddock would say)?
>
> Thanks for your help
> Tom
>
>
>
>
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>


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