File: Data.xml
<chapter author="jm">
<para>para1</para>
<para author="ar">para2</para>
<sect1 author="bd">
<para>para3</para>
<para>line 1</para>
<sect2 author="jm">
<para>line 2</para>
</sect2>
</sect1>
</chapter>
File: Transform.xslt
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<xsl:template match="chapter">
<chapter>
Authors
<xsl:for-each select="descendant-or-self::*/@author">
<xsl:value-of select="." />
<xsl:text/>
</xsl:for-each>
<xsl:apply-templates />
</chapter>
</xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?><chapter>
Authors
jmarbdjm
para1
para2
para3
line 1
line 2
</chapter>
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