What is APPEL and what is its relationship to P3P?
APPEL specifies a language for describing collections of preferences regarding P3P proposals between P3P agents. Using this language, a user can express her preferences in a set of preference-rules (called ruleset), which can then be used by her user-agent to make automated or semi-automated decisions regarding the exchange of data with P3P enabled Web sites. Note: This language is intended as a transmission format; individual implementations must be able to read and write their specifications in this language, but need not use this format internally. Goals of A P3P Preference Exchange Language The P3P1.0 specification provides a syntax for specifying proposals and a protocol and associated syntax for exchanging information between the Web site and user agent. It does not not specify requirements upon the graphical user interface (GUI) or trust engines. However, there are benefits to being able to express the preferences as captured by the GUI and processed by the trust engine: • Shari
