If I’m reading and interpreting that correctly, OBD devices aren’t given access to everything they could be given access to because car manufacturers like to keep things secret. They don’t want to give access to all the raw data flying around and every manufacturer has their own data format. OpenXC is intended to read that data and present it in one format. I bet that’s what the intention of OBD was in the first place, but they couldn’t get the manufacturers to agree to everything.
