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Abstract-The ontology alignment consists in generating a set of correspondences between entities. These entities can be concepts, properties or instances. The ontology alignment is an important task because it allows the joint consideration of resources described by different ontologies. This paper aims at counting all works of the ontology alignment field and analyzing the approaches according to different techniques (terminological, structural, extensional and semantic). This can clear the way and help researchers to choose the appropriate solution to their issue. They can see the insufficiency, so that they can propose new approaches for stronger alignment. They can also adapt or reuse alignment techniques for specific research issues, such as semantic annotation, maintenance of links between entities, etc.

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Semantic Web Services (SWS) are enriching Web services with machine processable semantics. To be implemented with less effort, SWS can reuse syntactic and semantic descriptions hidden under the source code of Web applications already developed. For this end, we propose a framework for reengineering Web applications, possibly already including some semantic technology, into WSMO-based SWS. The proposed framework consists in reverse engineering Web applications towards conceptual models specified with a proposed UML profile, from what syntactic and semantic descriptions of new SWS are generated. A set of tools have been developed and some experiments have been carried out to evaluate and validate the proposed framework.