Finding context position when "order by" is in aFLWOR?

[David Carlisle]

> Yes, but we're on an XQuery list so let's be polite.
oh no harm intended, I see for example Jonathan has already suggested a
possible approach to this in xquery version n, the point of the xsl:for-each
reference was really to float (again) the possibility of an iterator in
XQuery that moves the current item, which would be another possible
approach.

David