Are you really interested to create something which is not accessible to someone? Figure 1 illustrates that Semantic Web languages are based on XML and go up the Semantic Web Language Pyramid to RDF [Lassila et al], RDFS [Brickley et al], OIL [Horrocks et al], DAML+OIL [DAML+OIL], etc. The semantic HTML codes can be easily edited in the future. The  tag doesn't convey extra importance; rather, the tagged text is typically rendered in bold. Elements such as

,