Seconds left on the cast or channel in progress; 0 when none or when the client hides it.
The name of the spell being channeled now; undefined when none, or when the client hides it.
The player's class token ("PRIEST").
The item ID in an equipment slot; undefined when the slot is empty.
Where the player stands; undefined when the client hides it (instances).
Seconds between two Auto Shots; undefined when hidden (in combat).
The "Speed" of the ranged weapon from its tooltip; undefined when not found.
Has the player a target?
Is the player eating or drinking (a food or drink buff)?
Is a weapon (not a shield or a held item) in the off-hand slot?
In a town or an inn.
The forms on the stance bar (druid forms, warrior stances): each spell, and whether it is active (undefined: hidden).
Combo points: the highest readable of the player's power (modern) and the points on the target (Classic); one source may read 0 while the other has the real value. Undefined when neither is readable.
The name of the spell being cast now; undefined when none, or when the client hides it.