International Journal of Scientific & Engineering Research, Volume 4, Issue 6, June-2013 2129 ISSN 2229-5518 IJSER © 2013 http://www.ijser.org Ontology Based Web Portal Designing Manisha Kumari, Dr. Kanwal Garg Abstract- Web is a growing source of information. Web users surf web for different purpose. Some users surf the web to work, some for fun, students surf it for study purpose and particular users for financial information. These users visit dozen to twenty websites where they can find interesting information. Web portal is a special kind of data- intensive website that collects information from different source and organizes in a hierarchical way. Web portal is easy to design and populate according to end user purpose, but it leaves back-end database lacking of subject domain semantics and user cannot retrieve relevant information. Ontology based web portal is the solution of this problem which adds a semantic ‘layer’ in web portal implementation. This paper gives an approach that uses power of semantics to create a new type of web portal that is fully ontology based. Idea is to allow a user to create a new website by extracting information from different website’s sections selected by himself. Keywords : Ontology, Web Portal, Semantic, Website, information. 1. INTRODUCTION Web portal plays the role of an information aggregator and provides users with seamless service interface to access data in an integrated way [1]. Key features of web portal are personalization and knowledge management that differentiate it from ordinary website [2]. Examples of web portals are yahoo and company portals, which present resources inside and outside the company to their employees. Searching information about a topic on different-2 websites takes a lot of time especially of those users having the working necessity to find particular information on these websites. To overcome this problem, idea of ontology based web portal, in which information is semantically integrated, is described in this paper. Authors used semantics to process the structure of a particular website and design of corresponding module to patch on the portal and to provide application of a set of features according to user preference specified in his profile. To provide high level and effective services (conceptual search, personalization and social interaction), there is need to build semantic integration functionality in web portal and ontology is the basis for such functionality [1]. In this paper first of all ontology is created from website. Website mapping over an ontology is done by top-down or bottom-up approach. In top- down approach a set of algorithms are used to generate ontology from the web pages of a particular website [3]. But in bottom- up approach, ontology creation starts from the website database and structure. In this paper author used bottom-up approach to design ontology from website. This ontology is used to add a website or part of website in web portal. Knowledge is extracted from all ontologies of mapped websites and these ontologies form a semantic sublayer. Websites are patched on web portal according to user preference which is mentioned in user profile. This paper mainly focuses on first, second and fourth layer. This idea of web portal designing allows to use semantic to refine collected information according to user preference and founds important section in a customized portal. 2. TECHNICAL ARCHITECTURE Designed architecture of web portal contains four layers. Layer1 and layer 2 generate an ontology for every selected website, layer 3 extract knowledge from these ontologies and level 4 select websites or section of website to patch on web portal according to user preference collected during user profiling. IJSER