Ontology Classes. DBpedia. Upper ontology - Wikipedia. A number of upper ontologies have been proposed, each with its own proponents. Library classification systems predate upper ontology systems. Though library classifications organize and categorize knowledge using general concepts that are the same across all knowledge domains, neither system is a replacement for the other. Development[edit] Any standard foundational ontology is likely to be contested among different groups, each with their own idea of "what exists". One factor exacerbating the failure to arrive at a common approach has been the lack of open-source applications that would permit the testing of different ontologies in the same computational environment.
No particular upper ontology has yet gained widespread acceptance as a de facto standard. Another important factor leading to the absence of wide adoption of any existing upper ontology is the complexity. Arguments for the infeasibility of an upper ontology[edit] Historically, many attempts in many societies[which?] Cyc[edit] N-grams: based on 520 million word COCA corpus. Wordfish - Home. Related projects - WordNet - Related projects. GeoWordNet. Free Dictionary, Thesaurus, Multilingual Dictionary, Acronyms and Geographic Names Search - Wordvia.com. The Sweet Compendium of Ontology Building Tools. Download as PDF Well, for another client and another purpose, I was goaded into screening my Sweet Tools listing of semantic Web and -related tools and to assemble stuff from every other nook and cranny I could find. The net result is this enclosed listing of some 140 or so tools — most open source — related to semantic Web ontology building in one way or another.
Ever since I wrote my Intrepid Guide to Ontologies nearly three years ago (and one of the more popular articles of this site, though it is now perhaps a bit long in the tooth), I have been intrigued with how these semantic structures are built and maintained. That interest, in no small measure, is why I continue to maintain the Sweet Tools listing. As far as I know, the following is the largest and most comprehensive listing of ontology building tools available. There are some 140 tools, perhaps 90 or so are still in active use. I surely have missed some tools and likely improperly assigned others. Some Worth A Closer Look. GATE.ac.uk - index.html. The CPAN Search Site - search.cpan.org. The Stanford Wordnet Project.
TempoWordNet. BabelNet 2.5 - A very large multilingual encyclopedic dictionary and semantic network.