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On 19/12/2019 23:51, Michael Kay mike@xxxxxxxxxxxx wrote:
If this was schema-aware, then atomizing the @to attribute would return a list of atomic values, so it would all just work... No, you're right. I knew there would be an elegant solution that I would have missed, but it was getting late for my brain to be functioning properly. Thank you. Note that when the group-by expression selects multiple values, the element will appear in multiple groups. XSLT 3.0 introduces composite="yes" which means that the multiple values are treated as a single grouping key. Thanks again...in this case that's fine, as I am only addressing the very first occurrence. Peter
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