On 13.12.2018 19:40, Eliot Kimber ekimber(_at_)contrext(_dot_)com wrote:
If this is a real task support effort and not just a learning exercise and
you're using Oxygen then I would follow Graydon's lead and use XQuery 3 to
build a map that can then give you a quick answer.
If you move from XPath 2 to XQuery 3 you can as well solve it with grouping
for $row in /airports/row
group by $id := $row/navaid
where $row[2]
return $row
instead of having to build a map.
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