Editing Web Ontology Language (section)

==History==
===Early ontology languages===
{{Further|Knowledge representation and reasoning#History}}
There is a long history of [[ontology (information science)|ontological]] development in philosophy and computer science. Since the 1990s, a number of research efforts have explored how the idea of [[knowledge representation]] (KR) from [[artificial intelligence]] (AI) could be made useful on the World Wide Web. These included languages based on [[HTML]] (called [[Simple HTML Ontology Extensions|SHOE]]), based on XML (called XOL, later [[Ontology Inference Layer|OIL]]), and various frame-based KR languages and knowledge acquisition approaches.