Narrow Results

Traditional access control of CSCW system is lack of delegation mechanism. For improving it and achieving resource share in the heterogeneous distributed environment, Role-Activity Based Delegation Model for CSCW (abbr. RABDM for CSCW) was presented based on RBAC policies and the important properties of activity, object-oriented visual modeling was also further represented using Unified Modeling Language. The model with time and constraint characters solves the issue of authorization centralization in the actual application of Graphics and Images Collaboration Processing System Based on CSCW, and realizes distributed and dynamic characters. Visual modeling also shortens the gap between the abstract theory model and implementation of the applied system, and benefits designing and development of systems based on the self-contained model.