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In computer science, a knowledge base (KB) is a set of sentences, each sentence given in a knowledge representation language, with interfaces to tell new sentences and to ask questions about what is known, where either of these interfaces might use inference. [1] It is a technology used to store complex structured data used by a computer system.
The knowledge base contains domain-specific facts and rules [1] about a problem domain (rather than knowledge implicitly embedded in procedural code, as in a conventional computer program). In addition, the knowledge may be structured by means of a subsumption ontology , frames , conceptual graph , or logical assertions.
Expert systems were the first commercial systems to use a knowledge-based architecture. In general view, an expert system includes the following components: a knowledge base, an inference engine, an explanation facility, a knowledge acquisition facility, and a user interface. [48] [49] The knowledge base represents facts about the world.
Knowledge base. Personal knowledge base; Knowledge commons; Libraries – a library is a collection of sources of information and similar resources, made accessible to a defined community for reference or borrowing. [18] It provides physical or digital access to material, and may be a physical building or room, or a virtual space, or both. [19]
Wiki" (pronounced [note 1]) is a Hawaiian word meaning "quick". [ 5 ] [ 6 ] [ 7 ] The online encyclopedia project Wikipedia is the most popular wiki-based website, as well being one of the internet's most popular websites , having been ranked consistently as such since at least 2007. [ 8 ]
In the context of knowledge management, the closed-world assumption is used in at least two situations: (1) when the knowledge base is known to be complete (e.g., a corporate database containing records for every employee), and (2) when the knowledge base is known to be incomplete but a "best" definite answer must be derived from incomplete information.
A personal knowledge base (PKB) is an electronic tool used by an individual to express, capture, and later retrieve personal knowledge. It differs from a traditional database in that it contains subjective material particular to the owner, that others may not agree with nor care about.
A Knowledge base is a special kind of database for knowledge management. It provides the means for the computerized collection, organization, and retrieval of knowledge . It is also used for specified information and as a personal knowledge base .