I spent 2 years using a semantic reasoner to develop an ontology for reasoning about smartgrid vulnerabilities. Ignoring the web aspect, ontologies are very har

I spent 2 years using a semantic reasoner to develop an ontology for reasoning about smartgrid vulnerabilities. Ignoring the web aspect, ontologies are very hard. In addition, one needs to use multiple languages like one to express the ontology, and another to express a query. Change the ontology a little bit and the query will break when you run it. There was no integrated IDE that was complete.