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:*<b>The GAM</b>. | :*<b>The GAM</b>. | ||
:*<b>The GER model</b>. The Generic Entity-relationship model (GER) is a wide-spectrum information/data structure specification model. Encompassing the main concepts and constructs of most popular modeling formalisms, be they value-based or object-based, it has been given a precise semantics via an extended version of the NF2 (non-first normal form, or nested) relational model [6]. Through a specialization mechanism, such usual models as ERA, UML class diagram and ORM can be rigourously specified and compared [7]. Similarly, the GER can be used to define standard data models such as the relational, object-relational, CODASYL, IMS, XML or plain file structure models. | :*<b>The GER model</b>. The Generic Entity-relationship model (GER) is a wide-spectrum information/data structure specification model. Encompassing the main concepts and constructs of most popular modeling formalisms, be they value-based or object-based, it has been given a precise semantics via an extended version of the NF2 (non-first normal form, or nested) relational model [6]. Through a specialization mechanism, such usual models as ERA, UML class diagram and ORM can be rigourously specified and compared [7]. Similarly, the GER can be used to define standard data models such as the relational, object-relational, CODASYL, IMS, XML or plain file structure models. | ||
− | :*<b>The DB-MAIN model</b>. This model is a partial implementation of the GER. It has been developed for the DB-MAIN CASE environment. A precise definition can be found in the DB-MAIN manuals | + | :*<b>The DB-MAIN model</b>. This model is a partial implementation of the GER. It has been developed for the DB-MAIN CASE environment. A precise definition can be found in the DB-MAIN manuals [***] and in DB design tutorials [***]. |
:*<b>Temporal data models</b>. [P01-02] | :*<b>Temporal data models</b>. [P01-02] | ||
*'''Keywords''' | *'''Keywords''' |
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