15.3. The Proposed Data Model: XDM
In this section, we introduce the proposed data model, XDM (XML for Data Mining). We first show the basic idea that is behind a knowledge discovery process conducted through XDM; then we illustrate, by means of several examples, how XDM can be effectively used.
15.3.1. Basic Concepts
Past experience shows that data-mining tasks should be supported by a database system for several reasons. The first one is that data come from large databases and are often stored in data warehouses. The second reason is that if data-mining tasks are supported by a database, it helps to keep track of the intermediate and final results of the knowledge discovery process.
Nevertheless, the database support need not be necessarily ...
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