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  2. Extensional and intensional definitions - Wikipedia

    en.wikipedia.org/wiki/Extensional_and_in...

    An extensional definition gives meaning to a term by specifying its extension, that is, every object that falls under the definition of the term in question.. For example, an extensional definition of the term "nation of the world" might be given by listing all of the nations of the world, or by giving some other means of recognizing the members of the corresponding class.

  3. Extension (semantics) - Wikipedia

    en.wikipedia.org/wiki/Extension_(semantics)

    In any of several fields of study that treat the use of signs — for example, in linguistics, logic, mathematics, semantics, semiotics, and philosophy of language — the extension of a concept, idea, or sign consists of the things to which it applies, in contrast with its comprehension or intension, which consists very roughly of the ideas, properties, or corresponding signs that are implied ...

  4. Intension - Wikipedia

    en.wikipedia.org/wiki/Intension

    Part of its intension is that it has no extension. Intension is analogous to the signified in the Saussurean system, extension to the referent. In philosophical arguments about dualism versus monism, it is noted that thoughts have intensionality and physical objects do not (S. E. Palmer, 1999), but rather have extension in space and time.

  5. Relational model - Wikipedia

    en.wikipedia.org/wiki/Relational_model

    The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by English computer scientist Edgar F. Codd, [1] [2] where all data is represented in terms of tuples, grouped into relations.

  6. Enhanced entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Enhanced_entity...

    The enhanced entity–relationship (EER) model (or extended entity–relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity–relationship (ER) model, used in the design of databases.

  7. Intensional logic - Wikipedia

    en.wikipedia.org/wiki/Intensional_logic

    As for functors, some of them are simpler than others: extension can be attributed to them in a simple way. In case of a so-called extensional functor we can in a sense abstract from the "material" part of its inputs and output, and regard the functor as a function turning directly the extension of its input(s) into the extension of its output ...

  8. The Most Incompatible Zodiac Signs That Should Never, Ever ...

    www.aol.com/lifestyle/most-incompatible-zodiac...

    The tension between wanting to stay put vs. being antsy for more can be a real deal-breaker. Most Compatible Sign: Aries These two fire signs burn more brightly together. They both share that ...

  9. Comparison of relational database management systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_relational...

    A true fully (database, schema, and table) qualified query is exemplified as such: SELECT * FROM database. schema. table. Both a schema and a database can be used to isolate one table, "foo", from another like-named table "foo". The following is pseudo code: SELECT * FROM database1. foo vs. SELECT * FROM database2. foo (no explicit schema ...