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<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>
<xsl:include href="[utility/datasource.xsl]"/>
<xsl:variable name="meta">
<datasource type="main" mode="full" source="01_data/articles.xml" target="articles"/>
<target mode="plain" value="articles.xml"/>
</xsl:variable>
<xsl:key name="years" match="datasource/articles/entry/date/year/text()" use="." />
<xsl:template match="articles">
<xsl:for-each select="entry/date/year/text()[generate-id() = generate-id(key('years',.)[1])]">
<entry handle="{.}">
<xsl:call-template name="get_articles">
<xsl:with-param name="year" select="."/>
</xsl:call-template>
</entry>
</xsl:for-each>
</xsl:template>
<xsl:template name="get_articles">
<xsl:param name="year"/>
<xsl:for-each select="/datasource/articles/entry[date/year = $year]">
<article handle="{@handle}">
<title>
<xsl:value-of select="title"/>
</title>
<date>
<xsl:value-of select="date/full"/>
</date>
</article>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
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