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In Computer Science, an ABox is an "assertion component"—a fact associated with a terminological vocabulary within a knowledge base. The terms ABox and TBox are used to describe two different types of statements in ontologies. TBox statements describe a system in terms of controlled vocabularies, for example, a set of classes and properties. ABox are TBox-compliant statements about that vocabulary. TBox statements are sometimes associated with object-oriented classes and ABox statements associated with instances of those classes. Together ABox and TBox statements make up a knowledge base. ==Examples of ABox and TBox statements== ABox statements typically have the form: ''A is an instance of B'' or ''John is a Person'' This should be contrasted with TBox statements or (statements) about terminology such as: ''All Students are Persons'' or ''There are two types of Persons: Students and Teachers'' TBox statements tend to be more permanent within a knowledge base and tend to be stored in a data model or a metadata registry. In contrast, ABox statements are much more dynamic in nature and tend to be stored as instance data within transactional systems within databases. 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「Abox」の詳細全文を読む スポンサード リンク
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