XSLT: Add namespace to root element

namespaces, xslt

Solution

XSLT 2.0 isn't necessary to solve this problem.

Here is an XSLT 1.0 solution, which works equally well as XSLT 2.0 (just change the `version` attribute to `2.0`):

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 xmlns:xlink="http://www.w3.org/1999/xlink"
 exclude-result-prefixes="xlink"
 >
 <xsl:output omit-xml-declaration="yes" indent="yes"/>

 <xsl:template match="node()|@*">
  <xsl:copy>
   <xsl:apply-templates select="node()|@*"/>
  </xsl:copy>
 </xsl:template>

 <xsl:template match="/*">
   <xsl:element name="{name()}" namespace="{namespace-uri()}">

      <xsl:copy-of select=
        "namespace::*
           [not(name()='ns2')
          and
            not(name()='')
           ]"/>

      <xsl:copy-of select=
       "document('')/*/namespace::*[name()='xlink']"/>

      <xsl:copy-of select="@*"/>

      <xsl:attribute name="audience">external</xsl:attribute>
   </xsl:element>
 </xsl:template>
</xsl:stylesheet>

When the above transformation is applied on this XML document:

<foo
xsi:schemaLocation="urn:isbn:1-931666-22-9 http://www.loc.gov/ead/ead.xsd"
xmlns:ns2="http://www.w3.org/1999/xlink"
xmlns="urn:isbn:1-931666-22-9"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>

the wanted result is produced:

<foo xmlns="urn:isbn:1-931666-22-9"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:xlink="http://www.w3.org/1999/xlink"
     xsi:schemaLocation="urn:isbn:1-931666-22-9 http://www.loc.gov/ead/ead.xsd"
     audience="external"/>

Problem

Original source