I looked for this a few years back and didn't find anything. I know it is done a lot in practice. Canlifornia Eastern Labs (www.cel.com) has some good notes about it on their website (MeshConnect_Module_Series_DS-1.pdf for one). You can start to reverse engineer how they do it from that.
For FAB notes you could contact the board house and ask what they need to reduce any questions or problems once the data is recieved.
- IPC-A-610D covers Castellated Terminations
- Google search "castellated mounting holes fab notes"
Thanks Bob! Here is a 'star' for you. Oh wait, we can't do that yet...