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Given that e-catalogs are often autonomous and heterogeneous, effectively integrating and querying them is a delicate and time-consuming task. More importantly, the number of e-catalogs to be integrated and queried may be large and continuously changing. Conventional approaches where the development of an integrated e-catalog requires the understanding of(More)
One of the challenging problems that web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackle this problem in the context of description logics (DL). We formalize service discovery as a new instance of the problem of rewriting concepts using terminologies. We call this new(More)
One of the challenging problems that Web service technology faces is the ability to effectively discover services based on their capabilities. We present an approach to tackle this problem in the context of DAML-S ontologies of services. The proposed approach enables to select the combinations of Web services that best match a given request Q and(More)
An increasing number of organisations are jumping hastily onto the on-line retailing bandwagon and moving their operations to the Web. A huge quantity of e-catalogs (i.e., information and product portals) is now readily available. Unfortunately, given that e-catalogs are often autonomous and heterogeneous , effectively integrating and querying them is a(More)
As part of the MKBEEM project, we present an ontology based mediation framework for electronic commerce applications. The framework is based on a mediator/wrapper approach that supports an integrated view over multiple heterogeneous sources. The MKBEEM mediation system allows to fill the gap between customers queries (possibly expressed in a natural(More)