Semantic reference data management in the engineering enterprises. Semantic MDM is a system based on object’s behavior and interaction rules. Such systems are required in cases where large data arrays exist along with complex multiple links between objects and this data is used for making decisions based on experimental knowledge. Effective tool for making decisions in design using CAD. Unifies separated reference data across the enterprise and establishes an integrated access environment. Normalizes terms and definitions, standardizes reference data exchange protocol.