An Ontological Approach to Data-Mining for Emergency Medicine -------------------------------------------------------------- Atif Khan, John Doucette, Changjiu Jin, Lijie Fu, Robin Cohen ABSTRACT: We propose an evidence based personalized decision making AI system, targeted for time and knowledge constrained environments such as emergency medical situations. We utilize semantic knowledge representation and reasoning to answer user queries. Our approach facilitates logical inference over large amounts of data (based on heterogeneous information-sets from appropriate data-sources), providing answers to queries such as "can I administer a drug xxx to patient John?". All answers are backed up by verifiable logical proofs, making it possible to deduce as to why and how the system reached to a particular conclusion.