Here are some current terms EBSCO uses to describe journal subscriptions, ie journal subscription models:
PP = with or without a current subscription, user gets access only to paid years
AP = with a current subscription, user gets access to backfile; without a current subscription, user gets access only to paid years
Springer apparently uses AP model
non-enhanced orders = with a current subscription, user gets access to current year only; access stops 60 days after publication of last issue
enhanced
