Abstract. The widespread use of XML brings new challenges for its integration into general software development processes. In particular, it is necessary to keep the consistency between different software artifacts and XML documents when evolution tasks are carried out. In this paper we present an approach to evolve XML schemas and documents conceptually modeled by means of UML class diagrams. Evolution primitives are issued on the UML class diagram and are automatically propagated down to the XML schema. The XML documents are also automatically modified to conform to the new XML schema. In this way, the consistency between the different artifacts involved is kept. This goal is achieved by using an intermediate component which reflects how the UML diagrams are translated into the XML schemas.
Abstract. This paper presents an architecture for managing database evolution when all the components of the database (conceptual schema, logical schema and extension) are available. The strategy of evolution in which our architecture is based is that of 'forward database maintenance', that is, changes are applied to the conceptual schema and propagated automatically down to the logical schema and to the extension. In order to put into practice this strategy, each component of a database is seen under this architecture as the information base of an information system. Furthermore, a translation information system is considered in order to manage the translation of conceptual elements into logical schema elements. A current Oracle implementation of this architecture is also presented.
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