It is this use
of a temporary tag(temp), which makes the scope of
xsl:key the RTF..
No. The extra element isn't needed, you could just as well go
<xsl:key name="countDetail" match="projectsum" use="@id"/>
<xsl:variable name="projectSum">
<xsl:for-each select="//project">
<!-- other code -->
</xsl:for-each>
</xsl:variable>
The scope of a key is always the document containg the current node at
the point use use key(). xx:node-set makes a new document node when it
generates a node set from a result tree fragment, so the key is always
scoped to this generated document.
xsl:key by specification indexes all documents used in a stylesheet,
but in practice a system will only build an index for documents for
which key() is actually used.
David
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