xql-lang is an actively used query language created in 1998.

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Example code from the web:

select result:<$book.title, $book.author>
from bib:URL "www.a.b.c/bib.xml", book:$bib.book
where $book.publisher.name ="Addison-Wesley"
groupby $book.title

Last updated August 9th, 2020

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