Question About Alerts Date Restriction Strings w/ Two Dates per Collection Set

I've seen date restriction strings on alerts before that have included one date per collection set listed (a prism-clipdate), but I've never worked before with date restrictions where more than one date is listed per collection set. Example Date Restriction:
,1,2,prism-clipdate,n-novus-alert-date,N_DFEDPRE_QB3,20140428235038,20140429045103,N_DFEDPRE_QA1,20140428234726,20140429044747,N_DFEDPRE,20140428225145,20140429035535,N_DFEDPRE_QB1,20140428235038,20140429045119,N_DFEDPRE_QA2,20140428235038,20140429045103,N_DFEDPRE_QB2,20140428234726,20140429044747,N_DFEDPRE_QA3,20140428235038,20140429045119,

Can someone provide guidance on how this works? I'm looking for a high level understanding.

Answers