OK so here is my question, it seems like the payload function only works against numeric payloads. Further I can't see a way to get the payload to come out alone without the field value attached. What I would like is something like this, is this possible in any way? I know it would be easy enough to do some post query processing in a service layer but... just wondering about this. It seems like I should be able to get at the payload when it is a string.