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Nowadays, software technology is evolving very quickly according to new trends in technology, such as SOA (service oriented architecture) and web services. The SOA paradigm claims (1) to develop software as a set of services and (2) to handle legacy applications and artefacts using standardized technology, exposing their functionalities as services. On the other hand, paradigms like MDA (model- driven architecture) allow software engineers to deal with software in a comfortable way, abstracting it from technological complexity. As a derivation of the MDA concept, architecture driven modernization (ADM) focuses the reengineering process using models as first order artefacts. In this way, and following the chain legacy system-to-abstract representation-to-new system, we propose a complete process to reengineer relational databases at a model level to integrate them into SOA contexts as a set of services.