Semantic web usage ?

Semantic :

relating to meaning in language or logic.

Semantic web:

The first step is putting data on the Web in a form that machines can naturally understand, or converting it to that form. This creates what I call a Semantic Web—a web of data that can be processed directly or indirectly by machines.

The Semantic Web is a collaborative movement led by international standards body the World Wide Web Consortium (W3C). The standard promotes common data formats on the World Wide Web.

An extension of the current Web that provides an easier way to find, share, reuse and combine information. It is based on machine-readable information and builds on XML technology's capability to define customized tagging schemes and RDF's (ResourceDescription Framework) flexible approach to representing data.

The Semantic Web provides common formats for the interchange of data (where on the Web there is only an interchange of documents). It also provides a common language for recording how data relates to real world objects, allowing a person or a machine to start off in one database, and then move through an unending set of databases which are connected not by wires but by being about the same thing.

Semantic web is a logical extension of the current web instead of distant possibility.

A semantic web is a web where the focus is placed on the meaning of words, rather then on the words themselves

“The semantic theory provides an account of ‘meaning’ in which the logical connection of terms establishes interoperability between systems”.

Why do we need Semantic Web?

First of all, many people define the semantic web as a “web of meaning” or a “web of data” that will allow computer applications to exploit the data directly.

Vladimir Zelevinsky explained it like this in terms of information retrieval need/information retrieval technologies:

• Known Item Search -> Keyword Search (e.g., Google – where you need to find what you know exists);
• Unknown Item Search -> Guided Navigation (e.g., Faceted search – where you need to explore the data space);
• Unknown Relationship Search -> Semantic Web (where you are looking not for separate items in the repository, in this case the web, but for the connection(s) between them.

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