Protection and Versioning for OCT

This paper describes the extensions made for adding support for group development within the Oct/VEM CAD framework. In our implementation, a set of mechanisms has been incorporated into the Oct library. These contain support for versioning and concurrent access to Oct design objects. The mechanisms can be configured for establishment of specific design management styles. As an example, there is now support for organization of designs in terms of workspaces; but, the number of workspaces or the relationship between them must be established externally by a design management tool. Design management tools configure these mechanisms to establish policies to be followed by the other tools. With this architecture, integration of existing tools with distinct design management styles then becomes feasible.