How to to group sort and combine XML data?

[Jamie Moore]

<?xml version="1.0" encoding="ISO-8859-1"?>
<catalog>
	<cd>
		<title>Empire Burlesque</title>
		<artist>Bob Dylan</artist>
		<country>USA</country>
		<company>Columbia</company>
		<price>10.90</price>
		<year>1985</year>
	</cd>
	<cd>
		<title>Hide your heart</title>
		<artist>Bonnie Tyler</artist>
		<country>UK</country>
		<company>CBS Records</company>
		<price>9.90</price>
		<year>1988</year>
	</cd>
	<cd>
		<title>Greatest Hits</title>
		<artist>Dolly Parton</artist>
                <country>USA</country>
		<company>RCA</company>
		<price>9.90</price>
		<year>1982</year>
	</cd>
	<cd>
		<title>Still got the blues</title>
		<artist>Dolly Parton</artist>
		<country>UK</country>
		<company>Virgin records</company>
		<price>10.20</price>
		<year>1991</year>
	</cd>
	<cd>
		<title>Eros</title>
		<artist>Gary Moore</artist>
		<country>EU</country>
		<company>BMG</company>
		<price>9.90</price>
		<year>1997</year>
	</cd>
	<cd>
		<title>One night only</title>
		<artist>Bee Gees</artist>
		<country>UK</country>
		<company>Polydor</company>
		<price>10.90</price>
		<year>1998</year>
	</cd>
</catalog>

*************** ******
I need the output to look like:Group by Artist, sort by title
Dolly Parton
1. Greatest Hits, USA, RCA, 9.90, 1982
2. Still got the Blues, UK, Virgin Records, 10.20, 1991

BeeGees
1. One night only, UK, Polydor, 10.90, 1998

etc

[jkmyoung]

http://www.jenitennison.com/xslt/grouping/muenchian.html

<xsl:key name="cd-by-artist" match="cd" use="artist" />

<xsl:template match="catalog">
	<xsl:for-each select="cd[count(. | key('cd-by-artist', artist)[1]) = 1]">
		<xsl:sort select="artist" />
		<xsl:value-of select="artist" />,<br />
		<xsl:for-each select="key('cd-by-artist', artist)">
			<xsl:sort select="title" />
			<xsl:value-of select="title" /> (<xsl:value-of select="other information etc... " />)<br />
		</xsl:for-each>
	</xsl:for-each>
</xsl:template>