It's probably Can-based. Because EOBD/OBD2 is send on the same can-line the physical description of the hardware and the layout of the messages is the same as with any other manufacturer.
(Except there are 2 format methods, one with 11-bit addressing and one with 29-bit addressing).
Now knowing which address on the bus is which and how many time the message is transmitted per minute is the whole trick. But that part is propietary.
I don't think you will find much information on that subject on the internet.

Better use a custom dashboard. That will solve your problem with PATS also.