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Re: [xsl] Efficient XPath 2.0 expression to return each <row> element for which there are other <row> elements having the same navaid?

2018-12-13 12:50:41
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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