# OpenXC Message Format Changelog
+## v0.4-dev
+
+* Removed factor and offset from diagnostic requests to minimize the number of
+ fields, and since this is such an uncommon use case and one that can be
+ handled by the client receiving the data. We may add them back in the future.
+* Add `extras` field to JSON messages.
+* Expand range of mode field to a full byte (#10)
+
+## v0.3
+
+* Add diagnostic message request/response format.
+* Officially add Protcol Buffer encoding.
+* Change JSON delimiter to ```\0``` for both input and output.
+* Officially document version and device ID commands.
+
## v0.2
* Add a RAW can message format.