A data flow based architecture for CAD frameworks

A novel approach to integrating multi-tool design environments is described which involves making a data flow model of the tools and design methodologies within the relevant design environment and storing this model in a database. This information about the design environment is subsequently used as the basis for organizing and accessing the sets of design data which are used and created within this environment. This approach thus provides a bridge between design process related functions (tool invocation, design process checking and auditing, history logging, and design releasing) and functions related to the design data (data identification, data classification, version management, and data browsing). The main advantages of this technique are its user- and system-level simplicity. its ability to handle data in work-in-progress situations, its support for design methodology, its consistent handling of a wide range of data types and flexibility with respect to changes in the design environment.<>