Protocol Buffers - Google's data interchange format
Copyright 2008 Google Inc.
Overview
Protocol Buffers (a.k.a., protobuf) are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. This site holds Protocol Buffers documentation.
Protocol Buffers Repository
The Protocol Buffers GitHub repository is https://github.com/protocolbuffers/protobuf.
Developer Community
To be alerted to upcoming changes in Protocol Buffers and connect with protobuf developers and users, join the Google Group.