Find books in which some element has a tag ending in "or" and the same element contains the string "Suciu" (at any level of nesting). For each such book, return the title and the qualifying element.
FOR $b IN document("http://www.bn.com/bib.xml")//book,
$e IN $b/*[contains(string(.), "Suciu")]
WHERE ends_with(name($e), "or")
RETURN
<book>
$b/title,
$e
</book>
Adapted from XML Query Use Cases