tests/org.w3c.xqts.testsuite/Queries/XQuery/UseCase/UseCaseSGML/sgml-queries-results-q10.xq

(: insert-start :)
declare variable $input-context external;
(: insert-end :)

<result>
  {
    let $x := $input-context//xref[@xrefid = "top4"],
        $t := $input-context//title[. << $x]
    return $t[last()]
  }
</result>