Abstract: This study covers development contents and framework of STEP-compliant researches regarding recent advancement towards intelligent manufacturing system. ISO14649 different enumerations are means of developing a data models for CAD/CAM and CNC chain implementation on specific technology. The research trend was towards replacement of ISO6893 and enhancement of STEP (ISO1303) to incorporate CNC machine tool capability advancements. Mainly STEP-Interoperable manufacturing is to represent a common standard specifically aimed at intelligent manufacturing workstations. In this research, the system development intended to turn-mill operations, primarily in developing a data model (data structure of STEP-NC file), accompanied by a generic architecture and functionality. EXPRESS defined classes of AP224 domain are converted to an object oriented classes. They are serialized and de-serialized to and from a Part-28 file format implementation. The result is delivered limited to a generic STEP-NC data model based on manufacturing features sets of AP224.