GWT Autobean JSON spec

If I used Autobean on GWT client to serialise my POJO (sent out thro RequestBuilder) but I plan to use say, groovy, perl or php to service that request, I would need to know the serialization format of Autobean开发者_StackOverflow中文版.

What is and where can I get the JSON format spec for Autobean?

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They're documented here.