Corba-based Project Database, Collaborative Work Environment

This paper gives a discuss of theories and implementing methods of developing an distributed engineering database CSCW (Computer Supported Cooperative Work) based on ORACLE DBMS and CORBA techniques in detail. The access control are modeled mathematically. It gives the description of an existing system finished based on the analysis above, which deals the global data and the local data with three kinds of methods which include: processing directly with relational data; first changing it into object type then storing it into ORACLE database with some modal data which can not be classified into relational data; and to some data which is not easy to change into object type, integrating it through Open I-DEAS' s object oriented interfaces based on CORBA. It gives this cooperating system a panorama share of all kinds of its data through such methods mentioned above. It also combines structured analysis method and object oriented analysis methods of software engineering to conduct system modeling, static and dynamic UML(Unified Modeling Language) analysis and constructing work. By utilizing the large object of ORACLE and VRML (Virtual Reality Modeling Language) , it solved the problem of three dimension interacting of graphics. Conclusively this system provides a transparent, efficient and convenient platform to users who collaborate with each other in an engineering project.