seriesTitle.xq

xquery version "3.1";

declare function local:seriesTitle($Network as xs:string?) as xs:string 
  {
  switch ($Network)
    case "ABC" return "ABC World News Tonight"
    case "CBS" return "CBS Evening News"
    case "NBC" return "NBC Nightly News"
    default    return "unknown network"
 };
      
let $seriesTitle := local:seriesTitle("NBC")
return $seriesTitle