Avoiding duplicates in the node selection

["Max Rubinstein" <mrubinst at hotmail dot com>]

Hi,

I have the following XML source:

<Resources>
	<Resource URL="http://www.aspindustry.org/">
		<Keywords> <ASP/> <SB/> </Keywords>
	</Resource>
	<Resource URL="http://www.aspnews.com/">
		<Keywords> <ASP/> </Keywords>
	</Resource>
	<Resource URL="http://msdn.microsoft.com/wmi.asp">
		<Keywords> <WMI/> </Keywords>
	</Resource>
</Resources>

As you may notice, the same keyword may appear under different resources. My 
goal is to produce a list of keywords, sorted alphabetically, with no 
duplicates, to populate the HTML list with options.

This is the XSL I came up with:

<?xml version="1.0" ?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
version="1.0">
  	<xsl:template match="/">
  		<xsl:for-each select="//Keywords/node()">
			<xsl:sort select="name()" order="ascending"/>
			<option>
				<xsl:attribute name="value"><xsl:value-of 
select="name()"/></xsl:attribute>
				<xsl:value-of select="name()"/>
			</option>
  		</xsl:for-each>
  	</xsl:template>
</xsl:stylesheet>

It works, but I get duplicate entries as a result.  I would like to figure 
out how to remove duplicate keywords.

Thanks for any help,

-Max


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