• Jena Semantic Web Framework
  
  The Jena Web Site
  jena owl rdf semantic web
  in Zigtag Imported Bookmarks with java owl rdf semantic sparql web by 4 users
• The Protégé Ontology Editor and Knowledge Acquisition System
  in Zigtag Imported Bookmarks with ontology open-source owl rdf semantic web xml by 5 users

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