Research on management for drawing database in CAD system based on network

To solve such problems as low data consistence,large file replica and complicated version maintenance in traditional drawing archive management, a new object - oriented data storage structure of drawing archive is constructed. The incompatibility of drawing archive from heterogeneous CAD platforms is solved by storage and retrieval management of drawing archive used drawing archive class as objects. The multi - version management mode of drawing archive is explained, which can describe the evolution of versions clearly and implement multi ?version retrospect accurately. The concurrency control strategy of drawing archive data based on transaction language is put forward. It is verified that the method aforementioned enables the full combination of CAD technology and CSCW technology and improves the accuracy and consistency of drawing archive data in design process by an application example.