The xqueryformat of CSV records as a sequence of arrays [1] is very useful when parsing
but there seems to be no easy way to serialize from this format. Is this correct?

map {
  "records": ["Huber", "Sepp", "Hauptstraße 13", "93547 Hintertupfing"],
  "names": ["Name", "First_Name", "Address", "City"]
}
=>csv:serialize()

[SENR0001] Items of type map(xs:string, array(xs:string)) cannot be serialized.

... would be nice if it could. 
/Andy

[1] http://docs.basex.org/wiki/CSV_Module#XQuery