A Data Modelling Framework and Mapping Mechanism to Incorporate Conventional Cad Systems into an Integrated Design Environment

An Integrated Design Environment facilitates co-operation between different disciplines. The paper investigates the data modelling framework, distinguishes between homogeneous and heterogeneous model worlds, discusses the formal mapping mechanisms available to establish a heterogeneous model world, and introduces a way to incorporate CAD systems into IDE. A prototype IDE has been developed to prove these methods. The ID'EST prototype comprises its own core data model, different schemata to cope with several design views, a data management system to connect all applications seamlessly, and interfaces to incorporate external CAD systems. A prototype architectural data model has been defined, that includes core data model and aspect models for enclosure system and spatial system, and enables semantically meaningful descriptions of buildings. ID'EST uses an object-oriented database system to store and retrieve project data, that also supports design versions. The data management system provides consistent and straightforward mechanisms for controlling the data representation through interconnected modules.