Hi Peter,

I think the problem is due to the nodes you are applying the distinct() against.  You are applying the 'sager' template against the '$sager/bynavn' - which wont process that.  I've modified your XSLT, see if this works:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [
    <!ENTITY nbsp " ">
]>
<xsl:stylesheet
    version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:msxml="urn:schemas-microsoft-com:xslt"
    xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:ontranet="urn:ontranet"
    exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ontranet ">

    <xsl:output method="xml" omit-xml-declaration="yes"/>

    <xsl:param name="currentPage"/>

    <xsl:template match="/">
        <xsl:variable name="url" select="'http://data.notar.dk.nt11.unoeuro.com/husavisen.xml'"/>
        <xsl:variable name="pagexml" select="umbraco.library:GetXmlDocumentByUrl($url)" />
        <xsl:variable name="sager" select="$pagexml/sager/sag" />
        <xsl:apply-templates select="Exslt.ExsltSets:distinct($sager/bynavn)" />
    </xsl:template>

    <xsl:template match="bynavn">
        <xsl:value-of select="text()"/>
        <br />
    </xsl:template>

</xsl:stylesheet>

Now we apply the 'bynavn' template against the distinct node-set, rather than trying to do that per 'sag' item.

Hope this makes sense?

Cheers, Lee.

I thought it best to test this out... and I can't seem to get the 'distinct()' function to work! :-(

I keep getting the following exception (via the "umbDebugShowTrace=true" querystring)

umbracoMacro InnerException    Value cannot be null.
Parameter name: type
Value cannot be null.
Parameter name: type
  at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
  at umbraco.presentation.xslt.Exslt.ExsltCommon.ExsltNodeListToXPathNodeIterator(ExsltNodeList list)

I've tried various ways of passing the node-set, (and different XML sources too), but nothing works.

Hmmm... could be a bug in the eXSLT implementation? or am I doing something wrong?

Anyone got any ideas?

Cheers, Lee.

Peter, in the meantime, take a look at this other forum thread for an alternative approach:

http://our.umbraco.org/forum/developers/xslt/4482-xslt-distinct

Personally I've used the "Muenchian" method several times, works well, but takes a little time to understand how it works; with key indexes and generate-id().

Good luck, Lee.

@Lee - For what it's worth, your example works as expected with xsltproc on my Mac, so I'm guessing a bug in the EXSLT.NET (or what it's called) implementation...

/Chriztian

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