Abstract     The  advance  of  the  Web  has  significantly  and  rap idly  changed  the  way  of  information  organization,  sharing  and  distribution.  However,  most  of  the  information  that   is  available  has  to  be  interpreted  by  humans;  mach ine  support  is  rather  limited. The next generation of the web, the semant ic web, seeks to make information more usable by ma chines by introducing  a more rigorous structure based on ontology.  In th is context we try to propose a novel and integrated approach for migrating  data-intensive web into ontology-based semantic web  and thus, make the web content machine-understanda ble. Our approach  is based on the idea that semantics can be extracte d from the structures and the instances of HTML for ms which are the most  convenient  interface  to  communicate  with  relational   databases  on  the  current  Web.  This  semantics  is  ex ploited  to  help  build  ontology.     

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[26] Wang J. and Lochovsky F., Data Extraction and Label Assignment for Web Databases, in Proceedings of the 12th International Conference on World Wide Web (WWW) , Budapest, Hungary, 2003. Sidi Benslimane is a lecterer in the Department of Computer Science, Sidi Bel Abbes University, Algeria. He received the MSc degree in computer science from Sidi Bel Abbes University, Algeria, in 2001. He is a PhD candidate in Computer Science Department at Sidi Bel Abbes University fro m December 2002. His research interests include semantic web, web engineering, ontology engineering , and information systems. Mimoun Malki is an assistant professor at the Department of Computer Science at Sidi Bel Abbes University. He received the PhD degree in computer science from Sidi Bel Abbes University, Algeria, in 2003. He heads the Evolutionary Engineering and Distributed Information Systems Laboratory. His research interests include, knowled g management, information retrieval, ontology engineering, semantic web, web services, and soft computing systems. Mustapha Rahmouni is a professor at the Computer Science Department of the University of Oran Es-S nia, Algeria. He received the PhD degree in operational research from Southampton University UK, in 1987. He heads the Information Systems Laboratory and the local Doctoral School on STIC. His research interests include formal specifications, informatio n management and integration, process modelling, and knowledge management. Abdellatif Rahmoun is an associate professor at King Faisal University, KSA. He received the PhD degree in computer science from Sidi Bel Abbes University, Algeria, in 1998 . He has been involved in several research projects and teaching in Algeria. His research interests include, logic, genetic algorithms and genetic programming, neural networks and applications, e-learning, e- commerce, and e-business.