What to take from less significant DOC's/AOP's

I'm making flashcards and want to include important facts to memorize for example the year the DOC/AOP/AVA, etc. is established, communes of production, unique regional laws, minimum plant density.. it goes on. What else should I be including? What should I not include? I'm looking at the guildsomm compendium's smaller less important DOCs and an example is Controguerra DOC and the many "varietal" wine blends, many different styles' aging requirements as too much unnecessary info for an advanced exam.

In general, I'll take and write down info more often than not, but I don't want to skip over anything and I know it all helps me down the road anyways. Appreciate any advice.

Chris