[xsl] Save the sorted xml in a variable

[John Robb <john_ok@xxxxxx>]

How is it possible to save the sorted xml in a variable and then apply 
to it some xsl elements.
I'm using the following xsl but it doesn't work.I want to sort it by 
@sector and @subsector(see xml file bellow).In $sorted I just see the 
values of elements in <data> tags at the end/beginning.
xsl:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
 xmlns:ms="urn:schemas-microsoft-com:xslt">
	<xsl:output media-type="xml"/>
	<xsl:variable name="sorted">
		<xsl:apply-templates mode="copy" select="data"/>
	</xsl:variable>
	<xsl:template match="@*|node()" mode="copy">
		<xsl:copy>
			<xsl:apply-templates select="@*|node()">
				<xsl:sort select="@sector"/>
				<xsl:sort select="@subsector"/>
			</xsl:apply-templates>
		</xsl:copy>
	</xsl:template>
	<xsl:template match="/">
		<xsl:apply-templates select="ms:node-set($sorted)/*" mode="main"/>
 	</xsl:template>
 	<xsl:template match="item" mode="main">
 		<xsl:value-of select="."/>
 	</xsl:template>
</xsl:stylesheet>

AND the XML :
<?xml version="1.0" encoding="iso-8859-1" ?>
<data>
	<item id="i1"	sector="s1"	subsector="u1">561</item>
	<item id="i10"	sector="s3"	subsector="u4">15</item>
	<item id="i22"	sector="s2"	subsector="u2">1234</item>
	<item id="i11"	sector="s1"	subsector="u2">123</item>
	<item id="i17"	sector="s1"	subsector="u3">165</item>
	<item id="i61"	sector="s2"	subsector="u1">346</item>
	<item id="i12"	sector="s2"	subsector="u5">3425</item>
	<item id="i2"	sector="s3"	subsector="u4">78</item>
	<item id="i14"	sector="s3"	subsector="u4">51</item>
	<item id="i21"	sector="s1"	subsector="u5">346</item>
	<item id="i39"	sector="s3"	subsector="u2">463</item>
	<item id="i44"	sector="s2"	subsector="u3">151</item>
	<item id="i89"	sector="s1"	subsector="u1">451</item>
	<item id="i81"	sector="s2"	subsector="u4">771</item>
	<item id="i36"	sector="s2"	subsector="u5">5654</item>
	<item id="i27"	sector="s3"	subsector="u3">362</item>
	<item id="i15"	sector="s1"	subsector="u5">234</item>
	<item id="i18"	sector="s3"	subsector="u2">73</item>
	<item id="i51"	sector="s3"	subsector="u5">567</item>
	<item id="i26"	sector="s1"	subsector="u4">17</item>
	<item id="i95"	sector="s3"	subsector="u5">67489</item>
	<item id="i13"	sector="s1"	subsector="u3">54</item>
	<item id="i71"	sector="s1"	subsector="u3">2</item>
	<item id="i23"	sector="s2"	subsector="u1">345</item>
	<item id="i7"	sector="s2"	subsector="u1">67</item>
	<item id="i80"	sector="s1"	subsector="u3">7754</item>
	
        <sector id="s1">Sector 1</sector>
	<sector id="s2">Sector 2</sector>
	<sector id="s3">Sector 3</sector>

	<subsector id="u1">Subsector 1</subsector>
	<subsector id="u2">Subsector 2</subsector>
	<subsector id="u3">Subsector 3</subsector>
	<subsector id="u4">Subsector 4</subsector>
	<subsector id="u5">Subsector 5</subsector>
</data>
  
  
---
GSM.By.COM - hmrepmer-l`c`ghm qnrnb{u reketnmnb qr`md`pr` GSM,
`jqeqqs`pnb h g`ow`qrei j mhl. Xhpnjhi b{anp, p`gslm{e vem{,
noep`rhbm` dnqr`bj`. Pelnmr reketnmnb. http://www.gsm.by.com