The word semantic stands for “meaning” or related to meaning. Semantic Web is a “web of data”. Its basic function is to make machines enable to understand the meaning or information on World Wide Web. The term is more specifically used in reference to the formats and technologies which enable it. The web works more technically as it inserts machine readable data in the human readable links. By doing this, it provides an opportunity to the research agent, that he can access these pages of hyperlinks automatically. Resource Description Format, W3C, RDF Schema and Web Ontology Language are few of the technologies which provide a disciplined format for the Semantic Web.

Hypertext Markup Language generally abbreviated as HTML is capable of presenting human readable data that can simply be divided in documents and data. This is a loose division, which is usually understood on a common computer. HTML has few limitations in contrast to Semantic Web. It is unable to present machine readable data, which is totally left on browsing in combination of search engines. HTML decodes the words with limited explanation while Semantic Web can take the solutions a step ahead as, it is capable of describing arbitrary things like people, planets and places. Here different technologies work together to replace the content meaning on World Web.

Machine readable data enables content managers to decode the structure and description of content. In this way a machine is able to help computers in automated ways. It uses the same process as human analysis like inference and deductive meaning. The need of Semantic Web is based on assumption that it is possible for machines to go a step ahead than mere performing the ordered word relationships.

The idea of evolving a simple web to a Semantic Web was first presented in 2001, which was instantly received with equal enthusiasm and the idea worked quickly. It immediately replaced the old and systematic HTML, though still facing the severe questions by world critiques. Although the idea and the underlying format of Semantic Web is neither fully understood nor well explored, yet it has brought crystal revolution between the 2001-2007 worlds of web. Some suppose Semantic Web to be an extension of Web 3.0, which is all based on whom you speak to. It is assumed that Web 3 will be a combination of properties of Web 2 with its own ever expanding format of lexicon and applications.

Semantic Web has unbeaten social potential in contrast to HTML. Many have already started using it in the field of health and business for social networking. It can also be implemented in a democratic state where government can use it to control all online information, and feedback on certain social issues.

Instead; it is being implemented in various disciples of life, and has to face certain challenges. One of the biggest issues, it faces is that of vagueness and ambiguity with uncertainty. It all has to be dealt by automated reasoning system.

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