prov:value
| - Thus, given a principal P, an action A, a resource R, and a set of facts, an access control policy determines whether P can perform A on R. For example, if P is a user named ???Bob???, A is the action ???read???, and R is a file named ???foo.txt???, the question ???May Bob read foo.txt???? can be answered under the policy that governs access to the file (or file system, or other resource).
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