Resource Description Framework (RDF)

a framework for metadata and provides for interoperability for applications in "machine-understandable" information on the Web.&nbsp RDF draws upon several technologies such as XML (Extensible Markup Language).&nbsp RDF a recommendation of the World Wide Web Consortium currently headed by Tim Bermers-Lee, the creater of the HTML markup language and the http protocol that is the basis of the World Wide Web.&nbsp Over the long run, Berners-Lee envisions a time when Web sites can be devoid of most broken links and difficult-to-find information. The first step to understanding RDF is to distinguish between data and metadata.&nbsp&nbsp Metadata tags in documents and databases provide "data about data"&nbsplike unseen genes provide data about body parts. One of the drawbacks of HTML is that HTML tags relate only symbols rather than attributes of what the symbols depict.&nbspFor example, HTML tags tell us how to display the word "eyes" in a web document but there are no tags related to attributes such as eye color, eye size, vision quality, and susceptibility to various eye diseases.(More...)