Semantic Web ≠ Ontologies on the Web!

• Large, formal ontologies (like OWL) are important

• • general applications patterns indeed rely on them

• But: use complex ontologies only when necessary

• • you can be a perfectly decent citizen of the Semantic Web if you do not use OWL, or not even RDFS…

• Some of the ontologies may not be that complex

• • this is the essence of the development of “profiles” in the current OWL Working Group
  • just a small set of suitable terms to discover new relationships