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POxslt 1.0, select group of nodes with key
 

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  1. POxslt 1.0, select group of nodes with key
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    <p>I want to select nodes based on some variables. The XML code:</p> <pre><code>&lt;data&gt; &lt;prot seq="AAA"&gt; &lt;node num="1"&gt;1345&lt;/node&gt; &lt;node num="1"&gt;11245&lt;/node&gt; &lt;node num="2"&gt;88885&lt;/node&gt; &lt;/prot&gt; &lt;prot seq="BBB"&gt; &lt;node num="1"&gt;678&lt;/node&gt; &lt;node num="1"&gt;456&lt;/node&gt; &lt;node num="2"&gt;6666&lt;/node&gt; &lt;/prot&gt; &lt;prot seq="CCC"&gt; &lt;node num="1"&gt;111&lt;/node&gt; &lt;node num="1"&gt;222&lt;/node&gt; &lt;node num="2"&gt;333&lt;/node&gt; &lt;/prot&gt; &lt;/data&gt; </code></pre> <p>The XML that I want</p> <pre><code>&lt;output&gt; &lt;prot seq="AAA"&gt; &lt;node num="1"&gt;1345&lt;/node&gt; &lt;node num="2"&gt;88885&lt;/node&gt; &lt;/prot&gt; &lt;prot seq="BBB"&gt; &lt;node num="1"&gt;678&lt;/node&gt; &lt;node num="2"&gt;6666&lt;/node&gt; &lt;/prot&gt; &lt;prot seq="CCC"&gt; &lt;node num="1"&gt;111&lt;/node&gt; &lt;node num="2"&gt;333&lt;/node&gt; &lt;/prot&gt; &lt;/data&gt; </code></pre> <p>So, my idea has been to group the nodes with a xsl:key element, and then do a for-each of them. For example:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/&gt; &lt;xsl:key name="by" match="/data/prot" use="concat(@seq,'|',node/@num)"/&gt; &lt;xsl:template match="/"&gt; &lt;root&gt; &lt;xsl:apply-templates select="/data/prot"/&gt; &lt;/root&gt; &lt;/xsl:template&gt; &lt;xsl:template match="/data/prot"&gt; &lt;xsl:for-each select="./node"&gt; &lt;xsl:for-each select="key('by',concat(current()/../@seq,'|',current()/@num))"&gt; node &lt;xsl:value-of select="./node" /&gt; &lt;/xsl:for-each&gt; &lt;/xsl:for-each&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p>but the output is not what I expected, and I cannot see what I am doing wrong. I would prefer to keep the for-each structure. It is just as if I was not using properly the xsl:key grouping features.</p> <p>the output that I get, unwanted</p> <pre><code>&lt;root&gt; node 1345 node 1345 node 678 node 678 node 111 node 111&lt;/root&gt; </code></pre> <p>And the code as it to be tested <a href="http://www.xsltcake.com/slices/sgWUFu/20" rel="nofollow">http://www.xsltcake.com/slices/sgWUFu/20</a></p> <p>Thanks!</p>
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    1. USDimitre Novatchev
    1. USGerard
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    1. COAs a side note -- do use a true XSLT processor and not some "cake" that may or maynot be available whenever you need it and may be quite buggy. Good XSLT processors I recommend are: (XSLT 1.0) MSXML3,4,6, Saxon 6.5.4, .NET XslCompiledTransform, AltovaXML. (XSLT 2.0) Saxon 9.xx, XQSharp, AltovaXML.
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      1. USDimitre Novatchev
    2. COI am just working in the topic, that's why I have not answered yet. However, regarding you answer, do you refer to the web client xsltcake to do the tests? The processor I use in the code is firefox, I mainly use this web app to simplify the problem and, if I cannot solve, then post it here.
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      1. USGerard
    3. COGerard, I wouldn't recommend xslcake to any friend -- it is beta, unreliable (may not be available at any moment -- and an elementary DOS attack will put it down for a long time), it uses different XSLT processors producing different results (depending on the browser that sends the request) and sometimes produces ridiculous results. The authors themselves warn their users about the state and usefulness of this app. I recommend using a good XSLT IDE, such as the XSelerator or at list Kernow.
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      1. USDimitre Novatchev
 

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