XSLT 2.0 node variable select by attribute

Question

The XML File:

<XML>
    <Item ID = "test1"></Item>
    <Item ID = "test2"></Item>
</XML>

Result:

<XML>
    <Item ID = "TEST01"></Item>
    <Item ID = "TEST02"></Item>
</XML>

In my XSLT 2.0 file I want to acess the NewID of the variable if the currentID is equal to the OldID in order to change the attributes value with the predefined NewID.

<xsl:variable name="Items">
        <Item OldID="test1" NewID = "TEST01"></Item>
        <Item OldID="test2" NewID = "TEST02"></Item>
</xsl:variable>   

<xsl:template match="XML">
    <xsl:copy>
        <xsl:apply-templates />         
    </xsl:copy> 
</xsl:template>

<xsl:template match="Item">
    <xsl:copy-of select="@*[name()!='ID']" />
        <xsl:attribute name="ID">
            <xsl:value-of select="$Items/Item[@OldID = @ID]/@NewID"/>
        </xsl:attribute>
    </xsl:copy>
</xsl:template>

Answer 1

Try:

<xsl:value-of select="$Items/Item[@OldID = current()/@ID]/@NewID"/>

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PS Suggested reading: http://www.w3.org/TR/xslt20/#key