(: 3.4.8 Extension Option positive case :) declare namespace oraxqft = "http://www.oracle.com/technology/tech/xml/xmldb/index.html"; (: insert-start :) declare variable $input-context external; (: insert-end :) $input-context/books/book/author[name contains text (# oraxqft:user-index #){'Berner-lee'}]