Hi all. I'm hoping someone can help. I get an error message, " NodeTest expected here. USAGE-LOG-2.0/-->$<--command " , when trying to use a parameter value on a 'match=' keyword within the xsl:key statement.

like this....
<xsl:param name="command"/>
<xsl:key name="gis" match="USAGE-LOG-2.0/$command" use="U"/>

What I'm passing in is a specific node name that I wish to use as my key. Can it be done?

Thanks,
John

Two issues here. Firstly, variables in XSLT aren't macros: they represent values, not bits of expression text. If you want to test a variable name in a path expression, you can't write a/$b, you have to write a/*[name()=$b]. Secondly, though, in XSLT 1.0 there's a specific ban on using variables in the match pattern of a key. This is to prevent circularities where the variable depends on the key and the key depends on the variable.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Thanks Mike!

Here is what I'm trying to do.....I have various element names and I'm passing in a param for a unique element name that I wish to gather the rest of the xml data for.

Here is my XSL. I thought I could pass the param and assign it in the match= parameter but that appears to be a violation. I'm attempting to get a list of unique "U"sers that ran a SEARCH command. Various commands are contained in my XML data in which the command is actually an element node. I can't seem to figure out how to limit it to just the element name that I'm passing in. My goal was to have the highlighted statement read...match="USAGE-LOG-2.0/SEARCH".

<xsl:param name="command"/>
<xsl:key name="gis" match="USAGE-LOG-2.0/*" use="U"/>
<xsl:template match="node()">
<xsl:call-template name="Style"/>

<table>
<xsl:for-each select="//*[generate-id(.)=generate-id(key('gis',U)[1])]">
<xsl:sort select="U"/>

<tr><td>
<a target="details">
<xsl:attribute name="href">
<xsl:value-of select="concat('arc_log.asp?user=',U)" />
</xsl:attribute>
<xsl:value-of select="U" />
</a>
</td>
<td><xsl:value-of select="count(key('gis', U))" />
</td>
<td>
    <xsl:variable name="response">
    <xsl:for-each select="key('gis',U)">
            <accum>
                 <xsl:value-of select="vbs:vbDateDiff(string(T/@ts),string(T/@te))"/>
            </accum>
    </xsl:for-each>
    </xsl:variable>
    <xsl:value-of select="sum(msxsl:node-set($response)/accum)"/>
</td>
</tr>
</xsl:for-each>

</table>

</xsl:template>
</xsl:stylesheet>

Possible Suggestions:
1. for the key, use="concat(name(),U)"

2. use not following:: axis to determine uniqueness instead of key.
something like for-each //USAGE-LOG-2.0/*
<xsl:if test="not (following::*[(../name()='USAGE-LOG-2.0') and (name()=current()/name()) and (U=current()/U))]">

Don't know if either will work with what you're trying to do.