A method, system, software tool and computer program product for different modeling environments is described. A metamodel representation, termed a definition graph is configured as a directed weighted multi-graph representation of ordered pairs, being node and edge pairs. Each node and edge have an associated weight and attributes. The definition graph is validated. A user-generated model is then defined, and checked for compatibility with a validated metamodel. This is achieved by extracting a template graph from the instance graph of the user model as the basis for the comparison.
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