An Approach to Knowledge Base Management by Nelson M. Mattos

By Nelson M. Mattos

This publication addresses the advance of a brand new iteration of structures, wisdom Base administration platforms (KBMS), specifically built for powerful and effective administration of data bases, with the purpose of filling a part of the technological hole among synthetic intelligence and databases. The ebook first investigates intimately the layout approach, the structure, and the operating tools of data established platforms (KS) so that it will indicate the most important features of the sector in addition to its present boundaries, which serve then as foundation for an actual formula of KS necessities. An research and assessment of different methods (e.g., traditional DBS, non-standard DBS, coupling professional platforms and DBS) to wisdom administration is given. The publication exhibits that during constructing KBMS, the event acquired via the research of every of those methods is very very important for the reason that they supply the elemental options for development KBMS. The ways shouldn't be seen as entire and ultimate yet as a part of examine paintings in the direction of KBMS. a unique structure is defined for KBMS which integrates the performance, flexibility and modeling strength of DBS and AI. the most a part of the ebook bargains with all vital architectural difficulties of KBMS: equipment for wisdom illustration with designated emphasis on abstraction ideas, language proposals, and ideas for functionality development. The booklet relies on useful adventure gathered over 5 years of winning examine in coupling latest specialist structures and DBS, extending DBS with deductive functions, and primarily within the layout and implementation of a KBMS prototype. hence the book's proposals are illustrated with particular descriptions in their consciousness in present structures or prototypes.

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Uple uses of the same piece of knowledge, although it is represented just once in the KB. Furthermore, it usually possesses a well-understood and well-accepted formal semantics [Me64], and a very simple notation, which leads to a KB description that is easily understandable [My80]. 35 Procedural knowledge can also be represented in first-order predicate logic, however, only if the logical formulas are suitably interpreted. The programming language PROLOG [Mc80b,vEK76, Ko74] is an example of such an approach.

As such, it starts with the goal specification and tries to find rules whose conclusions match this goal. After finding such rules, it formulates as new goals the problems of satisfying the rule conditions in order to apply them. , by exploiting some conflict resolution strategy. Since a rule frequently has many conclusions, the process of satisfying a goal is usually transformed into the problem of satisfying many subgoals. , when they match some assertion of the KB. 8 shows a backward reasoning process in which the goal is fulfilled after the application of some rules and the satisfaction of the subgoals sg14, sg15, sg16, sg17, and sg18.

In some application areas, from which the class of diagnosis is the best example, problems cannot always be solved top down. In such classes, it is often most appropriate to solve problems at a lower level first and 51 then to investigate the higher levels of the problem solving abstraction hierarchy. In the diagno- sis case, the idea behind this approach is to analyze the diagnose (general or specific) that is the most suspicious one at each particular time. This may still be viewed as a hierarchical problem solution which, however, may now start at any level of the hierarchy.

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