Web Graph Database. (This excellent overview was written by Woody Pidcock of the Boeing company and posted at metamodel.com. It has been edited slightly so it could be archived here.) I will answer this question one step at a time. To keep this answer focused on the question, I will use other concepts that I will not define here. Download Owl Intranet Knowledgebase software for free. SourceForge.net: KAON Ontology Framework - Project Web Hosting - Open Source Software. Download KAON Ontology Framework software for free.