Github user kinow commented on the issue:
https://github.com/apache/jena/pull/237
Pull request updated. Now we have a new `NodeValueSortKey` type, and a
value space for it (`VSPACE_SORTKEY`). Unit tests added.
When the query contains text annotated with multiple languages, and you use
the arq:collation function, everything gets overwritten as a sort key <
collation, string >. So say that you have values such as "Casa"@es, "Casa"@pt,
"Haus"@de, and "House" in your values.
The function will get the string part (i.e. Casa, Casa, Haus, House),
discard anything else, and will sort everything according to the collation that
the user provided.
All unit tests passing. Might be interesting testing now in Fuseki, with
more elaborated queries. I believe the desired behaviour will work with this
change, but would be nice to have others playing a little bit with the function
and checking if there are no undesired changes.
Thanks!
Bruno
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