[Bug 26453] [xp3.1] Lowest common supertype

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26453

--- Comment #5 from Michael Kay <mike@saxonica.com> ---
In XQuery, LCST is also used in the definition of "order by":

The ordering is performed in the least common type that has a gt operator.

Again, this can be simplified. We only need to do conversions if different
primitive types are involved.

Conclusion: all uses of "least common type reachable by a combination of
subtype substitution and type promotion" can actually be reduced to "least
common type reachable by type promotion".

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Received on Wednesday, 17 September 2014 08:32:51 UTC