HTML meta headers?
The meta and link elements in HTML can be used to add metadata to an HTML page. In Semantic Web terms, this is equivalent to the process of defining RDF relationships for that page as a “source”. Note, however, that these elements can be used to define relationships for the enclosing HTML file only, whereas the Semantic Web allows the definition of relationships on any resource on the Web. That also means that the meta and link elements can be used by the author of the document only, whereas, on the Semantic Web, anybody could publish metadata concerning that page. GRDDL allows easy and automatic extraction of meta header data, such as that given by Dublin Core, to RDF.
