This book presents the SULTAN Trust Management framework, which consists of a simple notation for specifying trust and recommendation concepts and a set of tools for specifying, analysing and monitoring trust specifications. The toolkit includes a compiler for translating the Sultan notation into Prolog, and a Prolog-based analysis query builder, as well as pre-defined, typical queries relating to detecting conflicts or inconsistencies in the trust specification. In addition to queries about the source specifications, the system caters for queries that are related to the actual trust scenarios for which state information is held in the system. A monitoring service updates the experience information on which trust is based. The toolkit also includes a risk service for evaluation of simple risk queries, which can form constraints within a trust or recommendation.

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