Semantic web application generation using Protégé tool

In this paper we give details about the role of ontologies in Semantic Web and tools required for constructing Semantic Web applications. The Protégé tool for ontology development and knowledge acquisition can be adapted for editing models in different Semantic Web languages. In recent experiments to prototype the Semantic Web, members of different communities with different backgrounds have created a multitudinous of languages for representing ontologies and instance data on the Web. Typically, a Semantic Web language for describing ontologies and instance data contains a hierarchical description of important conceptual thing in a domain. Individuals in the domain are instances of these classes, and properties of each classes describes the various features and attributes of the concept. Logical statements describe relations among concepts. Protégé adopt the new world of the Semantic Web reusing its user interface, internal representation, and framework also it is useful in conceptual modeling with the new Semantic Web languages.