Semantic Web is a new emergent paradigm for the Web. It considers that current Web potentialities are not being exploited completely, especially because its use is currently user-centered. It suggests That the computer become part of web processing and not only the user interface. One of the most relevant problems is the partial or complete incompatibility between information communities. This incompatibility is currently manually solved. Semantic Web paradigm suggest to complement data with machine processable meta-data which allowed semantic-web aware systems to reason and infer new knowledge, and eventually define semantic bridges between two information communities permitting to transform on the fly data between those communities. In this paper we analyze several dimension of the problem, revising related approaches and proposing a consistent mapping process, which is the base of the prototype service on ontology mapping being developed.
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