syntax = "proto2"; import "google/protobuf/descriptor.proto"; message RangeProto { optional int32 start = 1 [default = 0, (help) = "start value"]; optional int32 step = 2 [default = 1, (help) = "amount to step by (positive)"]; optional int32 end = 3 [(help) = "inclusive end value, defaulting to the start value"]; } extend google.protobuf.FieldOptions { optional string help = 50000; } enum IndexMode { INDEXMODE_DRIVE = 0; INDEXMODE_300 = 1; INDEXMODE_360 = 2; }