Rdf Primer / quote 54 of 55
Anyone can say anything about any resource
These examples also illustrate one of the basic architectural principles of the Web, which is that anyone should be able to freely add information about an existing resource, using any vocabulary they please [BERNERS-LEE98]. The examples further illustrate that the RDF describing a particular resource does not need to be located all in one place; instead, it may be distributed throughout the Web. This is true not only for situations like this one, in which one organization is rating or commenting on a resource defined by another, but also for situations in which the original definer of a resource (or anyone else) wishes to amplify the description of that resource by providing additional information about it.