XSLT root tag namespace instead of element attribute namespace

Question

I have a XSL file to transfer another XSL file. I want the namespace declaration to be on the root tag, instead of it being repeated on every single element!!

Here is my stylesheet:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:mynamespace="somenamespace" version="2.0">
    <xsl:output method="xml" omit-xml-declaration="no" standalone="yes" indent="yes" />
    <xsl:template match="myMatchedNode">
        <mynamespace:tag>Some text i want inserted into the xsl</mynamespace:tag>
        <xsl:copy>
            <xsl:apply-templates select="@*|node()" /></xsl:copy>
    </xsl:template>
</xsl:stylesheet>

It outputs something like this:

....

<mynamespace:tag xmlns:mynamespace="somenamespace">Some text i want inserted into the xsl</mynamespace:tag>

....

How do i force the namespace declaration onto the root tag of the result?!

Answer 1

You need to insert the namespace node onto the document element of your result tree. There are several ways to do this, depending on whether you're using XSLT 1.0 or 2.0. The following is a 2.0 solution. I'm assuming that you're doing a modified identity transform on the input document (your question didn't really specify):

<xsl:stylesheet version="2.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  <!-- special rule for the document element -->
  <xsl:template match="/*">
    <xsl:copy>
      <!-- Add a namespace node -->
      <xsl:namespace name="mynamespace" select="'somenamespace'"/>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:copy>
  </xsl:template>

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

  <!-- the rest of your rules -->

</xsl:stylesheet>

For complete coverage of all the different techniques for controlling namespaces in your output document, check out the "Not enough namespaces" section of the "Namespaces in XSLT" article on my website.