By John Poole, Dan Chang, Douglas Tolbert, David Mellor

* Written via the authors of the typical Warehouse Metamodel (CWM) specification, this e-book is the authentic and authoritative developer's consultant * presents a complete examine tips to advance database and knowledge warehouse purposes utilizing the typical Warehouse Metamodel * Covers the whole improvement lifecycle together with software layout, * implementation, and deployment * significant other site comprises updates at the expertise, descriptions of instruments, and hyperlinks to seller websites

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Extra info for Common Warehouse Metamodel Developer's Guide

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This chapter describes the economic benefits ultimately realized by CWM-enabled data warehousing and analysis products and tools. In this chapter, we analyze the economic impact facing the data warehousing community when meta data integration is not readily available, why the CWM approach is the best bet to achieving integration, and how CWM is used to integrate diverse, multivendor software products and applications. Because all useful technologies also have their limitations, this chapter delineates the boundaries of CWM and describes aspects of data warehouse integration that CWM is not intended to solve.

This UML subset layer is used by CWM as its base metamodel. The Object layer consists of four metamodels: Core, Behavioral, Relationships, and Instance. The Core metamodel defines the most basic, static modeling elements residing within the core of the UML language. The Behavioral metamodel extends those static structures to define behavioral things, such as operations and procedures. The Relationships metamodel defines the basic relationships between model elements, such as the association between Table and Column.

A collection of SQL DDL statements can be viewed as a platform-specific model because it specifies the target information structure in the language of a particular computing platform (for example, a SQL-compliant relational database engine). 5, into SQL DDL is said to map the platform-independent model to a platform-specific model, based on some set of formal mapping rules that the translation process implements. Three very important conclusions can readily be drawn from the preceding observations: ■■ Any formal model of an information structure effectively is the meta data defining that information structure.

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