Trying to return a  list of all documents marked official with the REST API. No joy.

Hello,

I'm trying to return a list of all content in our communities marked 'Official' using the API, which I would then use in a widget - well, that's the plan.

I've been trying stuff like this: http://me.jiveon.com/api/core/v3/contents?filter=outcomeTypeNames=official but it returns this error:

     throw 'allowIllegalResourceCall is false.';

          {"error":{"message":"Invalid filter expression outcomeTypeNames=official","status":400}}

Here's the value in the document that makes it an official document:

"outcomeTypeNames" : [ "official" ]

I've been searching for help with this for ages. Any one able to shed some light on this for me?

Ronan