Nowadays, existing solutions for exchanging product information among CAD/CAM systems are limited to the process of geometrical data. Hence, semantics assigned to product model as the design intent containing constructional history, features, parameters, and constraints are completely lost during the translation process. Ontologies can be used in order to enhance capabilities of semantic interoperability among CAD/CAM systems. The main objective of our thesis is to enable the transfer of intelligent CAD models among different systems, keeping the design intent of the procedural feature-based model, viz. maintaining the original relations among entities of the model, which can be easily edited or modified. Our approach is based on the construction of common design features ontology as an Interlingua for the exchange of product data. This ontology is represented formally with a descriptive logic based language, notably OWL DL. Furthermore, axioms and mapping rules are defined to fulfill the integration between the applications ontologies and the constructed common ontology. The matching between concepts of our ontologies is enhanced with a semantic similarity measure in order to seek similar design features. A case study of our work is implemented using two CAD systems CatiaV5 and SolidWorks.