A Model Driven Approach for XML Database Development

In this paper we propose a methodological approach for the development of XML databases. Our proposal is framed in MIDAS, a model driven methodology for the development of Web Information Systems (WISs) based on the Model Driven Architecture (MDA) proposed by the Object Management Group (OMG). So, in this framework, the proposed data Platform Independent Model (PIM) is the conceptual data model and the data Platform Specific Model (PSM) is the XML Schema model. Both of them will be represented in UML, therefore we also summarize in this work an extension to UML for XML Schema. Moreover, we define the mappings to transform the data PIM into the data PSM, which will be the XML database schema. The development process of the XML database will be shown by means of a case study: a WIS for the management of medical images stored in the XML DB of Oracle.