<root xmlns:x1="url1" xmlns:x2="url2" ... xmlns:xN="urlN">
    <childNode1/>
    ...
    <childNodeN/>
</root>

<namespace node="root">
    <x1>url1</x1>
    <x2>url2</x2>
    ...
    <xN>urlN</xN>
</namespace>

<xsl:template match="root">
    <namespace>
        <xsl:attribute name="node">
            <xsl:value-of select="name()"/>
        </xsl:attribute>
        <xsl:for-each select="@*[contains(name(),'xmlns')]">
            <xsl:element name="{substring-after(name(),':')}">
                <xsl:value-of select="."/>
            </xsl:element>
        </xsl:for-each>
    </namespace>
</xsl:template>

<xsl:for-each select="namespace::*">
  <xsl:element name="{name()}">
      <xsl:value-of select="."/>
  </xsl:element>
</xsl:for-each>