You realize not all CAN messages are available on the OBDII. Many of those messages are protected behind a gateway that filters the messages. There are three classes If my memory is correct, User Scan Tool, Dealer, and OEM. Those messages are not published for many reasons. Putting additional messages on that bus may damage your vehicle. There is no standard for non OBD messages, each OEM (Original Equipment Manufacturer) does there own.
They also mix 11 and 29 bit CAN with variable Baud Rate.