By Keng Siau (Editor)

Complex subject matters in Database study is a chain of books at the fields of database, software program engineering, and structures research and layout. They characteristic the most recent examine rules and themes on the right way to increase present database structures, increase details garage, refine latest database versions, and increase complex purposes. complicated subject matters in Database study, quantity five is part of this series.Advanced themes in Database learn, quantity five provides the newest learn principles and subject matters on database structures and functions, and gives insights into vital advancements within the box of database and database administration. This ebook describes the functions and contours of recent applied sciences and methodologies, and offers state of the art learn principles, with an emphasis on theoretical matters concerning databases and database administration.

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There are UML formalizations based on different languages that do not use an intermediate language. However, this extra step provides some advantages. NEREUS would eliminate the need to define formalizations and specific transformations for each different formal language. The metamodel specifications and transformations can be reused at many levels in MDA. Languages that are defined in terms of NEREUS metamodels can be related to each other because they are defined in the same way through a textual syntax.

Directions for further refinement of ontology building methods are discussed. Copyright © 2006, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. 42 Hakkarainen, Strasunskas, Hella, & Tuxen INTRODUCTION The vision for the next generation Web is the Semantic Web (Berners-Lee, Handler, & Lassila, 2001), where information is accompanied by meta-data about its interpretation so that more intelligent information-based services can be provided.

We define a system of transformation rules to bridge the gap between UML/OCL models and NEREUS. We propose to specify metamodel transformations independently of any technology. We investigate the way to define them using UML/OCL and NEREUS. We want to define foundations for MDA tools that permit designers to directly manipulate the UML/OCL models they have created. However, meta-designers need to understand metamodels and metamodel transformations. We are validating the “megamodel” through forward engineering, reverse engineering, model refactoring, and pattern applications.

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