Help with door types

[F/O Junior]

Can anyone put some light on this:
Aircraft doors are divided into different types. There are:
Type A and Type I to IV.
From our A330 manual I learned that doors 1,2,4 L/R are type "A" doors and that the emergency exits 3 L/R are Type "I".
What about the types II, III and IV ? Any examples, definitions ?
Unfortunately our A32x manual doesn't specify the door types used on this A/C.

Thanks guys for your help