Language Guide (proto 2)

Covers how to use the proto2 revision of Protocol Buffers language in your project. This guide describes how to use the protocol buffer language to structure your protocol buffer data, including .proto file syntax and how to generate data access classes from your .proto files. It covers the proto2 revision of the protocol buffers language. For information on editions syntax, see the Protobuf Editi

[mabots]

extend

[yyamano]

Required Is Forever You should be very careful about marking fields as required. If at some point you wish to stop writing or sending a required field, it will be problematic to change the field to an optional field – old readers will consider messages without this field to be incomplete and may r

[n-sega]

protocol buffer

[mezashi184]

Protocol Buffers