box-o-sand/protobuf/src/tutorial/addressbook.proto

package tutorial;

enum Gender {
    NONE = 0;
    MALE = 1;
    FEMALE = 2;
    OTHER = 3;
}

message Person {
    required string name = 1;
    required int32 id = 2;
    optional string email = 3;
    optional Gender type = 4 [default = NONE];

    enum PhoneType {
        MOBILE = 0;
        HOME = 1;
        WORK = 2;
    }

    message PhoneNumber {
        required string number = 1;
        optional PhoneType type = 2 [default = HOME];
    }

    repeated PhoneNumber phone = 5;
}

message AddressBook {
    repeated Person person = 1;
}