Re: xsl:perform-sort sequence problem

I am using SaxonB 8.9 and I have the following xsl:perform-sort/sequence
problem.

When I try to sort the same sequence the distinct-values become one single
string:

<xsl:variable name="result">
        <xsl:perform-sort select="distinct-values($data/item/departure[@date
eq '2007-10-22']/returning/@date)">
                <xsl:sort/>
        </xsl:perform-sort>
</xsl:variable>
<xsl:value-of select="count($result)"/>

<xsl:value-of select="$result" separator=", "/>

=> 1
=> 2007-10-22 2007-10-23 2007-10-24

Can any body please helping me to clarify my misunderstanding of the
xsl:perform-sort.

t:\ftemp>type merico.xsl
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                exclude-result-prefixes="xsd"
                version="2.0">

<xsl:template match="/">
<xsl:variable name="data">
        <item id="1">
                <departure date="2007-10-22">
                        <returning date="2007-10-23"/>
                        <returning date="2007-10-24"/>
                </departure>
        </item>
        <item id="2">
                <departure date="2007-10-22">
                        <returning date="2007-10-22"/>
                        <returning date="2007-10-24"/>
                </departure>
        </item>
</xsl:variable>

Result 1:
<xsl:variable name="result1"
select="distinct-values($data/item/departure[@date eq
'2007-10-22']/returning/@date)"/>
<xsl:value-of select="count($result1)"/>: <xsl:text/>
<xsl:value-of select="$result1" separator=", "/>

Result 2:
<xsl:variable name="result2">
        <xsl:perform-sort select="distinct-values($data/item/departure[@date
eq '2007-10-22']/returning/@date)">
                <xsl:sort/>
        </xsl:perform-sort>
</xsl:variable>
<xsl:value-of select="count($result2)"/>: <xsl:text/>
<xsl:value-of select="$result2" separator=", "/>

Result 3:
<xsl:variable name="result3" as="xsd:string+">
        <xsl:perform-sort select="distinct-values($data/item/departure[@date
eq '2007-10-22']/returning/@date)">
                <xsl:sort/>
        </xsl:perform-sort>
</xsl:variable>
<xsl:value-of select="count($result3)"/>: <xsl:text/>
<xsl:value-of select="$result3" separator=", "/>

</xsl:stylesheet>
t:\ftemp>xslt2 merico.xsl merico.xsl con

Result 1:
3: 2007-10-23, 2007-10-24, 2007-10-22

Result 2:
1: 2007-10-22 2007-10-23 2007-10-24

Result 3:
3: 2007-10-22, 2007-10-23, 2007-10-24
t:\ftemp>

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