The ecosystem for knowledge representation, editing, retrieval, reasoning and querying is now mature thanks to OWL 2.0 standard, Protege, Pellet and SPARQL tools such as apache-jena-fuseki. Some of the initial work on this is documented at the following GitHub repository.
The credits for this work, and documentation of the ontologies are on GitHub: ConceptOnto
We are building a heroku based app to help browse the ontologies. Check it out at the following URL: