Everything converges to the equivalent of protocol buffers. Property lists -> XML -> Binary Property Lists JSON -> JSON Schema -> Binary JSON XML -> XML Sche

Everything converges to the equivalent of protocol buffers. Property lists -> XML -> Binary Property Lists JSON -> JSON Schema -> Binary JSON XML -> XML Schema -> XML Namespaces -> Binary XML Or you can skip all that faffing around and just jump straight to protocol buffers. :) ps. Protocol Buffers have a text format too that looks very similar to JSON. And you can encode protocol buffers as JSON, though I'm not sure there's good software support for it yet. I'm working on it.