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13.1 Overview

   The CWM Information Visualization metamodel defines metadata supporting the problem domain of “information publishing? or, more generally, “information visualization.?

   Within the data warehousing environment, data is collected from numerous, diverse sources and transformed into a unified representation that facilitates the analysis of data for purposes of gaining business insight. Robust and flexible information visualization tools are key to the effective analysis of this information. Information visualization tools must be capable of understanding and preserving the “logical structure? of data warehouse information, while enabling the user to perform any number of “rendering transformations? on information content (for example, displaying the same query result set in several different formats, such as a printed report, Web page, pie chart, bar graph, etc.).

   Since information visualization is a very broad problem domain, with a diverse set of possible solutions and many evolving standards, the CWM Information Visualization metamodel defines very generic, container-like metadata constructs that either contain or reference more complex visualization mechanisms at the M1-level. These metadata structures are intended to support the minimal metadata required to interchange more complex M1 models of visualization mechanisms.