Machine usable applications and processable data -- on the
Web:
  
  
    
      | 
          Unique names for data, applications, descriptions,
            relationships (URIs) 
          Web Service-enabled applications (SOAP, WSDL, etc.) 
          Common data model for expressing information (RDF) 
          Common vocabulary framework (OWL)
            
              Communities develop their own ontologiesShared ontologies for widely used vocabularies
                
                  Core math/sci, people, calendar, geospatial ...Mapping ontologies between community ontologies, where
                needed 
          Can use WS and SemWeb
            technologies to interface to existing databases |  | 
  
(Science
and the Semantic Web, J. Hendler, Science, Jan 2003)