import module namespace json = "http://www.zorba-xquery.com/modules/converters/json";
import module namespace file = "http://expath.org/ns/file";

let $rec :=
    <rec>
        <key>key</key>
        <val>this is my "val" indeed. I also have single'quotes.
Here is a newline. And here:  is a tab character.
I have a backslash \, a forward slash /.
Here are some entities: double-quotes &quot; less-then &lt; greater-than &gt; ampersand &amp; apostrophe &apos;
And here are character references: bell &#x8; ; formfeed &#xC;</val>
    </rec>
return 
file:write(
  "output.txt",
  json:serialize($rec,
    <options xmlns="http://www.zorba-xquery.com/modules/converters/json-options"> <json-format value="JsonML-array"/></options>
  ),
  ()
)