text: Protégé: https://protege.stanford.edu/ 
  
  Protégé Best Practices. Summary page on my blog for all my articles on Protégé, OWL, SWRL, etc.: 
  https://www.michaeldebellis.com/post/best-practices-for-new-protege-users 
  
  SHACL Playground: https://shacl.org/playground/ 
  
  SWRL Presentation by Martin O’Connor: 
  https://protege.stanford.edu/conference/2009/slides/SWRL2009ProtegeConference.pdf 
  
  WebProtégé: https://webprotege.stanford.edu/ 
  
  WebVOWL: Web-based Visualization of Ontologies: http://vowl.visualdataweb.org/webvowl.html 
  
  14.3 Papers 
  Berners-Lee (2001). The Semantic Web: A new form of Web content that is meaningful to computers will 
  unleash a revolution of new possibilities. With James Hendler and Ora Lassila. Scientific American, May 
  17, 2001. https://tinyurl.com/BernersLeeSemanticWeb 
  
  MacGregor, Robert (1991). "Using a description classifier to enhance knowledge representation". IEEE 
  Expert. 6 (3): 41–46. doi:10.1109/64.87683 https://tinyurl.com/MacGregorLoom 