I defined an array variable in my XQUERY:

declare variable $ca as array(xs:integer) external := [];

How can I assign a value (e.g [1,2]) to this variable through the URL? I have already tried:

http://host:port/rest/dbname?run=query.xq&$ca[]=1&$ca[]=2

That didn't work. Neither did this:

http://host:port/rest/dbname?run=query.xq&$ca=1,2

Perhaps

  $ca=[1,2]

? Not sure whether square brackets in a URL query part need some escaping, however.