Query with distinct

For each author in the bibliography, list the author's name and the titles of all books by that author, grouped inside a result element.

   FOR $a IN distinct(document("http://www.bn.com")//author)
     FOR $b IN document("http://www.bn.com")/bib/book[author=$a]
     RETURN $b/title

Adapted from XML Query Use Cases

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Copyright 2000, 2001 Elliotte Rusty Harold
Last Modified March 7, 2001