Trying to match elements NOT found in external documen

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Subject: Trying to match elements NOT found in external document
From: "G. T. Stresen-Reuter" <tedmasterweb@xxxxxxxxx>
Date: Tue, 31 Mar 2009 20:04:55 +0100

Hi.

It's been a while since I've written. I hope this email finds everyone doing well... on to business...

I'm trying to match items in the source XML document that are NOT present in an external XML document.

For example, Given the following XML documents I would like to match the atom:entry element whose atom:id = xyz by virtue of the fact that there is no corresponding email story with the same id.

feedsource.xml
<atom:feed>
    <atom:entry>
        <atom:id>123</atom:id>
        <atom:title>Story 1</atom:title>
    </atom:entry>
    <atom:entry>
        <atom:id>ABC</atom:id>
        <atom:title>Story 2</atom:title>
    </atom:entry>
    <atom:entry>
        <atom:id>xyz</atom:id>
        <atom:title>Story 3</atom:title>
    </atom:entry>
</atom:feed>

emailedstories.xml
<emails>
    <email>
        <story>
            <id>123</id>
        </story>
        <story>
            <id>ABC</id>
        </story>
    </email>
</emails>

I've tried the following and in spite of the fact that most documentation states that keys include documents included via the document() function, I've been unable to verify that this is true. Here is the stylesheet I've tried to no avail:

<xsl:key name="emailedstories" match="id" use="normalize-space(.)" />

[...]  <xsl:for-each select="document('../subscriptions/emailedstories.xml')/ emails/email"> [...]

 <xsl:apply-templates select="atom:entry[count(key('emailedstories', atom:id)) = 0]" />

This doesn't work. I suspect I'm confused about what the context node is and/or about comparing node sets vs. strings/numbers.

Does anyone have any suggestions on how to do what I'm trying to do?

Many thanks in advance!

----

G. T. Stresen-Reuter
Web: http://tedmasterweb.com
Blog: http://tecnotertulia.com
Twitter: http://twitter.com/tedmasterweb

Current Thread
Trying to match elements NOT found in external document G. T. Stresen-Reuter - 31 Mar 2009 19:06:23 -0000 <= Emmanuel Begue - 31 Mar 2009 19:39:44 -0000 Michael Ludwig - 31 Mar 2009 20:42:43 -0000 G. T. Stresen-Reuter - 31 Mar 2009 22:17:51 -0000

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