The problem isn't the federated nature, it's the combination of: - loose standardization, and lack of proper versioning - Postel's law, which is a recioe for

The problem isn't the federated nature, it's the combination of: - loose standardization, and lack of proper versioning - Postel's law, which is a recioe for disaster Takeaway if you want to design a federated protocol use a “the server chose violence” approach and reject any messages that is not perfectly compliant with the expected input for the given version (which must be part of the protocol itself).