RE: [xsl] Can you index document() nodeset with <xsl:key?

["Hondros, Constantine" <Constantine.Hondros@xxxxxxxxxxxxxxxx>]

Thanks David,
Yes, I should have been switching context with <xsl:for-each. It turns out
that there was also some unexpected behaviour with the key matching.

Xalan bundled with JDK1.5 only retrieves my keyed nodes if the lookup value
is first wrapped in a variable, then has string() applied to it. Saxon just
needs it wrapped in a variable.

Below, you can see how I set up the key and read in my look-up table :

<xsl:key name="topicid" match="topic" use="@id" />
<xsl:variable name="catalog" select="document('../build/catalog.xml')" />

Next, in the document being transformed, I need to refer to keyed values
using the attribute @href as a key:

<xsl:variable name="hrefvalue" select="@href" />
<xsl:for-each select="$catalog">
	<xsl:value-of select="key('topicid', $hrefvalue)" />
</xsl:for-each>


The above doesn't work as I expect it to with Xalan: the <xsl:value-of>
statement returns the string "http://www.w3.org/XML/1998/namespace"; instead
of the node I want. Saxon behaves as expected. When I instead do the
following :

<xsl:variable name="hrefvalue" select="@href" />
<xsl:for-each select="$catalog">
	<xsl:value-of select="key('topicid', string($hrefvalue))" />
</xsl:for-each>

... Xalan is happy.

Odd, because I thought that the key() function itself would take care of the
required string conversion stuff.

Cheers.


-----Original Message-----
From: David Carlisle [mailto:davidc@xxxxxxxxx]
Sent: 01 July 2005 17:40
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Can you index document() nodeset with <xsl:key?



keys automatically work (separately) on any loaded document.
so you just want
<xsl:key name="x" match="..." use="..."/>
at the top level

and make sure that you are in teh correct document when you call key()
as key (in xslt1) only ever returns nodes in the current document.


<xsl:for-each select="$mynodeset">
  <xsl:apply-templates select="key('x','something')"/>
</xsl:for-each>

> Is the approach at least valid? 
you didn't show  any of your usage of keys so hard to say.

David



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