Data Tactics Corporation held a Semantic and Ontology Interoperability Summit on February 12, 2013. Data Tactics is an open source advocate that provides data architecture, engineering, and management services to defense and intelligence agencies. They have over 200 employees, including data scientists and semantic researchers, and have deployed multiple open source clouds globally for the DNI, NSA, Army, Air Force, and DARPA to help customers gather, correlate, and analyze increasing data sources.