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POXSLT 2.0 Xpath error "not a node item"
 

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    <p>my first post here - sure hope someone will know the answer! I have been able to find solutions for many issues I had, but not for this one. The questions and answers on this site on the same subject did not solve my issue...</p> <p>I have an xml containing Format specifications like</p> <pre><code>&lt;Format&gt; &lt;TagNr&gt;92&lt;/TagNr&gt; &lt;Option&gt;A&lt;/Option&gt; &lt;Format&gt;//[N]15d&lt;/Format&gt; &lt;/Format&gt; &lt;Format&gt; &lt;TagNr&gt;92&lt;/TagNr&gt; &lt;Option&gt;B&lt;/Option&gt; &lt;Format&gt;//3!a/3!a/15d&lt;/Format&gt; &lt;/Format&gt; </code></pre> <p>TagNr + option is a unique combination within this nodeset.</p> <p>I defined a key to make using the set of formats easier:</p> <pre><code>&lt;xsl:key name="xx" match="//Format/Format" use="concat(../TagNr, ../Option)"/&gt; </code></pre> <p>I can indeed use this key and get the correct value, but only in non-special elements; I get an error "Error in XPath 2.0 expression Not a node item" when using this key within for-each or other constructs like the one below.</p> <p>What I try to achieve is the following: In other nodes processed there is a string of options for which I wish to retrieve the format for each character. For example:</p> <pre><code>&lt;Tag&gt; &lt;TagNr&gt;92&lt;/TagNr&gt; &lt;Options&gt;AB&lt;/Options&gt; &lt;/Tag&gt; </code></pre> <p>I have been trying lots of variants of the below but no luck:</p> <pre><code>&lt;xsl:variable name="TN"&gt;&lt;xsl:value-of select="TagNr"/&gt;&lt;/xsl:variable&gt; &lt;xsl:variable name="optList"&gt; &lt;xsl:analyze-string select="./Options" regex="[A-Z]"&gt; &lt;xsl:matching-substring&gt; &lt;xsl:variable name="TNO" select="concat($TN, .)"/&gt; &lt;opt&gt; &lt;tag&gt;&lt;xsl:value-of select="$TNO"/&gt;&lt;/tag&gt; &lt;fmt&gt;&lt;xsl:value-of select="key('xx', $TNO)"/&gt;&lt;/fmt&gt; &lt;/opt&gt; &lt;/xsl:matching-substring&gt; &lt;/xsl:analyze-string&gt; &lt;/xsl:variable&gt; </code></pre> <p>Splitting into individual characters using the regex goes fine and when retrieving (only) the value for opt/tag that goes fine too. But when I add opt/fmt, I run into the mentioned error message for the Xpath expression <strong>select="key('xx', $TNO)"</strong>.</p> <p>I tried defining a variable based on the key function as suggested in another thread on this site, but did not succeed.</p> <p>Can anyone help me?</p>
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