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Integrating Applications on the Semantic Web
The Semantic Web is an extension of the current Web in which information is given well-defined meaning, better enabling computers and people to work in cooperation. It is based on the idea of having data on the Web defined and linked such that it can be used for more effective discovery, automation, integration, and reuse across various applications.
W3C Semantic Web
The Semantic Web provides a common framework that allows data to be shared and reused across application, enterprise, and community boundaries. It is a collaborative effort led by W3C with participation from a large number of researchers and industrial partners.
Semantic Web History: Nodes and Arcs 1989-1999
This is a work in progress, and an early release of the document for feedback from the RDF Interest Group. It is intended as an informal discussion document, and is not a formal publication of any working group, or of the W3C itself.
Wikipedia Web 2.0
An in-depth overview of Web 2.0