[xsl] XSLT key() function document argument

[Bill French <french@xxxxxxxxxxxxx>]

Hi all,

I have a stylesheet that initializes some keys based on content in the 
input document. Then, the stylesheet applies templates to a node set 
variable whose contents come from an external file. For awhile I was 
very confused, because the keys weren't accessible from the templates 
that were being applied in the different context.

<xsl:key name="c" match="rm:content" use="string(@name)"/>
<xsl:key name="l" match="rm:label" use="string(@name)"/>
<xsl:variable name="orig-context" select="/"/>

...

<xsl:variable name="wf">
    <xsl:copy-of select="document($wf-filepath)"></xsl:copy-of>
</xsl:variable>

<xsl:template match="/rm:contentList">
    <xsl:apply-templates select="$wf"/>
</xsl:template>

<xsl:template match="rm:insert[@label]">
    <xsl:apply-templates select="key('l', @label, $orig-context)"/>
</xsl:template>

The variable $wf contains the rm:insert elements that are matched by the 
final template.

Now the question is -- is there a way to reference the "original" 
context, i.e., the document that processor originally encounters as the 
input tree? I've stored the document in the variable $orig-context, but 
this doesn't seem like an efficient or particularly elegant solution. Is 
there some special syntax to access the original context from a context 
created when applying templates to a node set variable?

Many thanks,

--Bill