Hi Andy,

You can serialize the map by specifying the 'xquery' format as option:

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

The result:

  ​Name,First_Name,Address,City
  Huber,Sepp,Hauptstraße 13,93547 Hintertupfing
​
​Cheers,
Christian
​




On Tue, May 29, 2018 at 4:43 PM, Andy Bunce <bunce.andy@gmail.com> wrote:
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