All that is
stopping me is that XSLT doesn't - as far as I know - allow for keys to
be used on exsl:node-set()s,
keys, once set up, automatically apply, separately, to any document that
is used and so if your exsl:node-set() returns a node set consisting of
a root node / which it will if it is given a result tree fragment coming
from xsl:variable, then your keys will apply to that.
David
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