Download Advanced Topics in Database Research, Vol. 3 by Keng Siau PDF

By Keng Siau

This paintings offers study rules and issues on the way to improve database structures, increase details garage, refine present database versions, and strengthen complex purposes. It additionally offers insights into very important advancements within the box of database and database administration.

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Is prohibited. 32 Halpin An ORM metamodel for Barker ER is shown in Figure 4. Entity types are identified by name, and attributes are identified by combining their name with their entity type. Value constraints on domains and attributes are specified as shown. Here the subset constraint (circled “⊆”) is applied between role-pairs, the first pair being projected from a join path. This constraint verbalizes thus: if a Domain hosts an Attribute that has a possible Value then that Domain has that possible Value.

Some other aspects of the UML metamodel are then discussed. The final section summarizes the main contributions, notes some advantages of an attribute-free modeling approach, and lists references for further reading. INFORMATION ENGINEERING The Information Engineering approach was originated mainly by Clive Finkelstein, who developed a modeling procedure for the notation and extended IE to Enterprise Engineering (EE). com/~ieinfo/). The IE notation was later adapted by Martin (1993). Although Martin’s recent books favor the UML notation, IE is still used far more extensively for database design than UML, which is mostly used for object-oriented code design.

113-126). Berlin: Springer. , & Jacobson, I. (1999). The Unified Modeling Language user guide. Reading: Addison-Wesley. A. (1996). Conceptual schemas with abstractions: Making flat conceptual schemas more comprehensible. Data and Knowledge Engineering, 20(1), 39-85. P. (1976). The entity-relationship model—towards a unified view of data. ACM Transactions on Database Systems, 1(1), 9-36. , & Meersman, R. (1995). A logic framework for a semantics of object oriented data modeling. In M. ), Proc. OOER’95: Object-oriented and entityrelationship modeling, (pp.

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