Policy Template
Policy specification with placeholder for subject or target or both
Actual subjects or targets are defined when a policy instance is created from template
O+ on x.HighTemp D {administer (analgesic)} x:t
O+ on x.HighTemp NurseB {administer (analgesic)}x:WardB
Notes:
Policy template is also like a mould but for policies
Different subjects, targets or both but the same actions and constraints
Can be used to create policies that are not part of roles.