Display `map(*)` contents in eXide

display-map.xq

declare function local:display-map($m as map(*)?) as element()? {
  if (exists($m)) then
    <map>{
        for $k in map:keys($m) return
        <key name="{$k}">{
            for $v in $m($k) return
            typeswitch ($v)
            case document-node() return <document uri="{document-uri($v)}"/>
            case attribute() return <attribute name="{name($v)}">{xs:string($v)}</attribute>
            case map(*) return local:display-map($v)
            default return $v
        }</key>
    }
    </map>
  else ()
};