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If there are specific things on the list that you don't EVER want your people users to see ever, then uncheck it locally rather than uninherit. Alexander Street Press is a resource that you can't access unless your campus subscribes.
Hathitrust is unchecked because a log of it is subscription and unavailable to search unless your campus subscribes. Database of Open Access Journals is checked
Changes to activation activations are picked up on Thursday and indexed over the weekend.
PCI harvests data from SFX to determine which you subscribe to that should be included in initial results.resources your campus subscribes to. It adds this information to its knowledgebase to differentiate "library collections" from the "beyond the library's collections" expanded results.