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Build unique nodeset when Key can't be used?

Subject: Build unique nodeset when Key can't be used?
From: J S Publications <admin@xxxxxxxxxx>
Date: Wed, 17 Oct 2001 13:45:50 +0100
unique node set

I have a <paragraph> element that can contain one or more <link> elements. Each <link> has a @type and a @id attributes. When @type='Figure' the link is to an image. I want to output each <paragraph>, followed by a list of pictures referenced in the <paragraph>.

I have tried:

<xsl:template match="paragraph">
        <xsl:apply-templates mode="DoIt" />
        <xsl:apply-templates select=link[@type='Figure']" mode="PlacePic" />

Which works but will repeat a reference to an image if a <link> with a given @id occurs more than once in the <paragraph>.

How can I get a list with just one entry for each image? I can't see how to you key, because key is a root-level element and so can't work with just the current <paragraph>. I have tried for-each but can't come up with a select that returns a 'unique' node-set.

Any ideas?


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