The output xml I hope to get

  <?xml version="1.0" encoding="ISO-8859-1"?>
  <catalog>
	  <settings>

Your stylesheet is not generating any catalog or settings elements.
> <xsl:template match="/catalog">
>    <xsl:apply-templates>
>     <xsl:sort select="title" />
>    </xsl:apply-templates>
> </xsl:template>
>

This template doesn't generate an element it just applies templates to
the children of catalog.

You could add <xsl:copy or <catalog> but then it would be equivalent to
your template matching node() so simplest is just to delete this
template.


David



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