linked data

Linked data is one ot the technologies used in the Semantic Web. URIs are used in RDF to represent concepts, but may not be retrevaable as a URL. In a linked data resourec, the URIs can be retreuved on the web as RDF documents that give information about the thing refered to by the URI. This enables automated reasoning systems to find out more about things, in a simialr way to humans accessing web pages. Often they have a human readable form as well retreived either by changung the file extension (html vs rdf) or using HTTP headers when retrieving the document.