Abstract Purpose of this paper is to resolve model documents changes management, which is a part of model management system in a simulator-supported platform. It is a complex procedure to develop training simulators, which amount of structured and non-structured data will be product. To management these data as well as the procedure, it is needed to describe by using of conceptual model based xml/ontology metadata. And a method is proposed to relate model documents by conceptual model, which would be used for model changes management. Keywords conceptual model, ontology, training simulator.