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    <p><strong>I. This XSLT 1.0 transformation</strong>:</p> <pre><code>&lt;xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;xsl:key name="kEntryByNum" match="logentry" use="substring-before(msg, ':')"/&gt; &lt;xsl:template match="/*"&gt; &lt;table&gt; &lt;tr&gt;&lt;th&gt;revision&lt;/th&gt;&lt;th&gt;comment&lt;/th&gt;&lt;/tr&gt; &lt;xsl:apply-templates select= "logentry [generate-id() = generate-id(key('kEntryByNum', substring-before(msg, ':'))[1]) ] "/&gt; &lt;/table&gt; &lt;/xsl:template&gt; &lt;xsl:template match="logentry"&gt; &lt;tr&gt;&lt;td colspan="2"&gt;&lt;xsl:value-of select="substring-before(msg, ':')"/&gt;&lt;/td&gt;&lt;/tr&gt; &lt;xsl:for-each select="key('kEntryByNum', substring-before(msg, ':'))"&gt; &lt;tr&gt; &lt;td&gt;&lt;xsl:value-of select="@revision"/&gt;&lt;/td&gt; &lt;td&gt;&lt;xsl:value-of select="msg"/&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/xsl:for-each&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre> <p><strong>when applied on the following XML document</strong>:</p> <pre><code>&lt;log&gt; &lt;logentry revision="1236"&gt; &lt;author&gt;me&lt;/author&gt; &lt;date&gt;2011-11-25T08:28:57.024571Z&lt;/date&gt; &lt;msg&gt;JIRA-5678: commit message&lt;/msg&gt; &lt;/logentry&gt; &lt;logentry revision="1237"&gt; &lt;author&gt;me&lt;/author&gt; &lt;date&gt;2011-11-25T08:28:57.024571Z&lt;/date&gt; &lt;msg&gt;JIRA-5679: commit message&lt;/msg&gt; &lt;/logentry&gt; &lt;logentry revision="1238"&gt; &lt;author&gt;me&lt;/author&gt; &lt;date&gt;2011-11-25T08:28:57.024571Z&lt;/date&gt; &lt;msg&gt;JIRA-5679: commit message&lt;/msg&gt; &lt;/logentry&gt; &lt;logentry revision="1235"&gt; &lt;author&gt;me&lt;/author&gt; &lt;date&gt;2011-11-25T08:28:47.024571Z&lt;/date&gt; &lt;msg&gt;JIRA-5678: - commit2 message&lt;/msg&gt; &lt;/logentry&gt; &lt;logentry revision="1234"&gt; &lt;author&gt;me&lt;/author&gt; &lt;date&gt;2011-11-25T08:28:37.024571Z&lt;/date&gt; &lt;msg&gt;JIRA-5678: commit3 message&lt;/msg&gt; &lt;/logentry&gt; &lt;/log&gt; </code></pre> <p><strong>produces the wanted, correct result</strong>:</p> <pre><code>&lt;table&gt; &lt;tr&gt; &lt;th&gt;revision&lt;/th&gt; &lt;th&gt;comment&lt;/th&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2"&gt;JIRA-5678&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1236&lt;/td&gt; &lt;td&gt;JIRA-5678: commit message&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1235&lt;/td&gt; &lt;td&gt;JIRA-5678: - commit2 message&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1234&lt;/td&gt; &lt;td&gt;JIRA-5678: commit3 message&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="2"&gt;JIRA-5679&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1237&lt;/td&gt; &lt;td&gt;JIRA-5679: commit message&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt;1238&lt;/td&gt; &lt;td&gt;JIRA-5679: commit message&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; </code></pre> <hr> <p><strong>II. XSLT 2.0 solution</strong>:</p> <pre><code>&lt;xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"&gt; &lt;xsl:output omit-xml-declaration="yes" indent="yes"/&gt; &lt;xsl:strip-space elements="*"/&gt; &lt;xsl:key name="kEntryByNum" match="logentry" use="substring-before(msg, ':')"/&gt; &lt;xsl:template match="/*"&gt; &lt;table&gt; &lt;tr&gt;&lt;th&gt;revision&lt;/th&gt;&lt;th&gt;comment&lt;/th&gt;&lt;/tr&gt; &lt;xsl:for-each-group select="logentry" group-by="substring-before(msg, ':')"&gt; &lt;xsl:apply-templates select="."/&gt; &lt;/xsl:for-each-group&gt; &lt;/table&gt; &lt;/xsl:template&gt; &lt;xsl:template match="logentry"&gt; &lt;tr&gt;&lt;td colspan="2"&gt;&lt;xsl:value-of select="substring-before(msg, ':')"/&gt;&lt;/td&gt;&lt;/tr&gt; &lt;xsl:for-each select="current-group()"&gt; &lt;tr&gt; &lt;td&gt;&lt;xsl:value-of select="@revision"/&gt;&lt;/td&gt; &lt;td&gt;&lt;xsl:value-of select="msg"/&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/xsl:for-each&gt; &lt;/xsl:template&gt; &lt;/xsl:stylesheet&gt; </code></pre>
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    1. COthis is exactly what I wanted, thanks! (I tried XSLT 2.0 solution)
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    2. CO@bobah: You are welcome. Hope that I have also shown what is a good, representative source XML that makes a question well-defined.
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