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A personal knowledge base (PKB) is an electronic tool used to express, capture, and later retrieve the personal knowledge of an individual. 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. Importantly, a PKB consists primarily of knowledge, rather than information; in other words, it is not a collection of documents or other sources an individual has encountered, but rather an expression of the distilled knowledge the owner has extracted from those sources. == Definition == The term personal knowledge base itself was coined in 2011 by Stephen Davies of the University of Mary Washington〔 and has a tripartite definition: * personal: a PKB is intended for private use, and its contents are custom-tailored to the individual. It contains trends, relationships, categories, and personal observations that its owner perceives but which no one else may agree with. It can be shared, just as one can explain one's own opinion to a hearer, but it is not jointly ''owned'' by anyone else any more than explaining one's opinion to a friend causes the friend to own one's mind. * knowledge: a PKB contains knowledge, not merely information. Its purpose is not simply to aggregate all the information sources one has seen, but to preserve the knowledge that one has ''learned'' from those sources. When a user returns to a PKB to retrieve knowledge she has stored, she is not merely pointed back to the original documents, where she must relocate, reread, reparse, and relearn the relevant passages. Instead, she is returned to the distilled version of the particular truth she is seeking, so that the mental model she originally had in mind can be easily reformed. * base: a PKB is a consolidated, integrated knowledge store. It is a reflection of its owner's memory, which, as Bush and many others have observed, can freely associate any two thoughts together, without restriction. Hence a PKB does not attempt to partition a user's field of knowledge into multiple segments that cannot reference one another. Rather, it can connect any two concepts without regard for artificial boundaries, and acts as a single, unified whole. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Personal knowledge base」の詳細全文を読む スポンサード リンク
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