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copied!<p><strong>I would use keys -- both for convenience and efficiency</strong>:</p> <pre><code>key('kPlaysByAuthor', 'Shakespeare, William') </code></pre> <p><strong>To select just the <code>playcode</code>:</strong></p> <pre><code>key('kPlaysByAuthor', 'Shakespeare, William')/playcode </code></pre> <p><strong>Here is a complete example</strong>:</p> <pre><code><xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output omit-xml-declaration="yes" indent="yes"/> <xsl:strip-space elements="*"/> <xsl:key name="kPlaysByAuthor" match="edition" use="metadataBlock/meta[@name='Creator']/@content"/> <xsl:template match="/"> <xsl:copy-of select= "key('kPlaysByAuthor', 'Shakespeare, William')/playcode"/> </xsl:template> </xsl:stylesheet> </code></pre> <p><strong>when this transformation is applied on the following XML document:</strong></p> <pre><code><works> <editions> <edition> <playtitle>Henry IV, Part 1</playtitle> <playcode>1H4</playcode> <genre>play</genre> <metadataBlock> <meta content="Shakespeare, William" name="Creator"/> </metadataBlock> </edition> <edition> <playtitle>Some Title</playtitle> <playcode>XYZ</playcode> <genre>play</genre> <metadataBlock> <meta content="Someone, Else" name="Creator"/> </metadataBlock> </edition> </editions> </works> </code></pre> <p><strong>the wanted, correct result is produced</strong>:</p> <pre><code><playcode>1H4</playcode> </code></pre>

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