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The following is offered as an introductory example. Imagine that a university offers students a tab in its portal to manage their white-pages entry in the online campus directory. Let's say that students should be allowed to control which elements of their white pages information should be viewable by anyone and which should be viewable only by faculty, staff and students at the same institutioninstitutions within a specified set.
Atomic functionality required to implement such a management tool and the associated online white pages:
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