1. Russell, M., and Kim, H. (2006). Learning UML 2.0, O’Reilly Media, Inc.
2. (2022, August 22). Web Ontology Language (OWL). Available online: https://www.w3.org/OWL/.
3. (2022, August 22). Extensible Markup Language (XML) 1.0 (Fifth Edition). Available online: https://www.w3.org/TR/xml/.
4. (2022, August 22). RDF 1.1 Concepts and Abstract Syntax. Available online: https://www.w3.org/TR/rdf11-concepts/.
5. (2022, August 22). RDF 1.1 Semantics. Available online: https://www.w3.org/TR/rdf11-mt/.