message State {
  optional int64 time = 1;
  optional string state = 2;
  optional string service = 3;
  optional string host = 4;
  optional string description = 5;
  optional bool once = 6;
  repeated string tags = 7;
  optional float ttl = 8;
}

message Event {
  optional int64 time = 1;
  optional string state = 2;
  optional string service = 3;
  optional string host = 4;
  optional string description = 5;
  repeated string tags = 7;
  optional float ttl = 8;
  repeated Attribute attributes = 9;

  optional sint64 metric_sint64 = 13;
  optional double metric_d = 14;
  optional float metric_f = 15;
}

message Query {
  optional string string = 1;
}

message Msg {
  optional bool ok = 2;
  optional string error = 3;
  repeated State states = 4;
  optional Query query = 5;
  repeated Event events = 6;
}

message Attribute {
  required string key = 1;
  optional string value = 2;
}