addressbook.proto

package addressbook;
message Person {
    required string name = 1;
    required int32 id = 2;        // Unique ID number for this person.
    optional string email = 3;

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

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

    repeated PhoneNumber phone = 4;

    optional int64 data = 5;
  
    optional sint32 data32 = 6;
  
    optional sint64 data64 = 7;

    required double datadouble = 8;

    required float  datafloat = 9; 
  
    optional uint32 datau32 = 10;
  
    optional uint64 datau64 = 11;

    optional bool   databool = 12;

    optional bytes databyte = 13;
  
    optional fixed32 datafix32 = 14;
  
    optional fixed64 datafix64 = 15;
  
    optional sfixed32 datasfix32 = 16;
  
    optional sfixed64 datasfix64 = 17;

    optional float datafloat_scientific = 18;
    
    optional double datadouble_scientific = 19;

    extensions 100 to 200;
}

extend Person {
    optional string hobby = 100;
}

message AddressBook {
    repeated Person person = 1;
}