That's a somewhat dated list. EXP's show R0 for standby code, and they are now R1 for example. There is no more R0.

Positive space company business travelers don't even appear on the standby list anymore....as they are...positive space. The only exception to that being that if the traveler is waiting for an upgrade, they go on the list with a UPGE priority code. Just in case anyone is wondering.... that code falls below everyone else standing by for an upgrade.

DSR still is the top priority code and will put you at the very top of the list. However, it is for someone already confirmed on the particular flight that desires accomodation in a cabin other than that which they are confirmed. (Best example would be a full fare F on one flight who wound up with a coach reservation on another flight.... i.e., original trip gets cxld for mechanical or something)