This volume constitutes the proceedings of the 4th International United Information Systems Conference, UNISCON 2012, which was held in Yalta, Ukraine, during J

Knowledge Engineering (KE) is a field within artificial intelligence that develops knowledgebased systems. KE is the process of imitating how a human expert in

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There is no single approach to modelling and model-based systems development that is best for all possible situations. Therefore, a high-level overview is neede

This brilliant textbook explains in detail the principles of conceptual modeling independently from particular methods and languages and shows how to apply them