Suntisrivaraporn, BoontaweeBoontaweeSuntisrivarapornKhurat, AssadaratAssadaratKhurat2022-01-282022-01-2820115th international workshop, MIWAI 2011, Hyderabad, India, December 7 - 9, 2011 ; proceedings. - (Lecture Notes in Computer Science ; Vol. 7080 LNAI). - Seite 87-99 (2011)http://hdl.handle.net/11420/11591Privacy has become a crucial issue in the online services realm. P3P policy, which is a privacy policy, enables websites to express their privacy practices so that users can be well-informed about the data collection and its usage. Besides, this privacy policy can be checked against its users' privacy preferences to help decide whether or not the service should be used. However, the interpretation of a P3P policy is unwieldy due to the lack of a precise semantics of its descriptions and constraints. For instance, it is admissible to have purpose and recipient values that have inconsistent meaning. There is a need for an explicit formal semantics for P3P policy to mitigate this problem. In this paper, we propose to use an OWL ontology to systematically and precisely describe the structures and constraints inherent in the P3P specification. Additional constraints are also defined and incorporated into the ontology in such a way that P3P policy verification can be automated with the help of an OWL reasoner. © 2011 Springer-Verlag.enPrivacy PolicyDescription LogicFormal SemanticComposite ServicePrivacy PreferenceInformatikConference Paper10.1007/978-3-642-25725-4_8978-3-642-25725-4Other