Tests that external XQuery variables are bound to XProc parameters.
WilliamShakespeareChristopherMarloweBenJohnson
declare namespace test = "http://www.test.com";
declare variable $str external;
declare variable $test:str external;
for $author in //author[contains(firstname, $str) or contains(firstname, $test:str)]
order by $author/firstname
return $author
ChristopherMarloweWilliamShakespeare