What is a semantic web?
A. The Semantic Web extends the web’s HTML infrastructure to include semantic information defined by XML and the Resource Description Framework (RDF). RDF views information as a directed labeled graph and serializes it in XML. Less formally, RDF codes information using subject-verb-object triples. As a very simple hypothetical example, the triple (www.ncar.ucar.edu/ccm/1/1, Temperature, 45.5) is a subject-verb-object triple giving the Temperature for a particular data record specified by the URL. RDF can be used to encode much more complicated assertions about data, metadata and relationships defined from them. The semantic web also supports ontologies so that data taxonomies can be used, which is very important for many data analysis and data mining applications.
