Slide 82 of 93
Notes:
This is the package declaration for the user defined four valued type package. It includes the four valued enumerated type itself, a vector or array of that type, and a subtype of type time to be used for delay values. Functions and/or procedures could be declared in the package (with their actual implementation descriptions included in the package body), but that will be deferred until module 12, Behavioral VHDL.
