Select distinct attributes

[codeWarrior456]

I have the following XML sample:

<?xml version="1.0" encoding="utf-8" ?>
<Sample>
<Parent>
<Child>
<Key value="0"/>
</Child>
<Child>
<Key value="1"/>
</Child>
</Parent>
<Parent>
<Child>
<Key value="0"/>
</Child>
<Child>
<Key value="1"/>
</Child>
</Parent>
</Sample>

I want to select all of the distinct value attributes. My final results should be:

0
1

How can I do this?

 

[tsuji]

[1] xslt1.0
[1.1] At top level, a xsl:key element
[tt]
<xsl:key name="uniqueattvalue" match="Key/@value" use="." />
[/tt]
[1.2] Then this shows the unique values from a template (no reference to context, or context root / as illustration).
[tt]
<xsl:for-each select="//Key/@value">
<xsl:if test="count(.|key('uniqueattvalue',.)[1])=1">
<xsl:value-of select="." /><xsl:text>[/tt]&#x0a;[tt]</xsl:text>
</xsl:if>
</xsl:for-each>
[/tt]
[2] xslt2.0
[2.1] Again from a template (no reference to context, or context root / as illustration).
[tt]
<xsl:for-each select="distinct-values(//Key/@value)">
<xsl:value-of select="." /><xsl:text>[/tt]&#x0a;[tt]</xsl:text>
</xsl:for-each>
[/tt]