Documentation for response from orient.js 'exec' call?

[Eric24]

Here is an example of what I get back from an orient.js 'exec' call:

{
 "status": {
   "code": 0,
   "sessionId": 123
 },
 "results": [{
   "type": "f",
   "content": "1"
 }]
}

I've not been able to find any documentation on this. Is that available anywhere? While I can "reverse engineer" some of it, by looking at different responses, it would be nice to have:

1. a list of status codes
   
2. what type and content actually mean in results
   
3. why is results an array (when will it contain multiple items)

And most importantly, is this the only format that will ever be returned from an 'exec'?