Interest in product data exchange and interfaces in the CAD/CAM area is
steadi- ly growing. The rapidly increasing graphics applications in
engineering and sci- ence has led to a great variety of heterogeneous
hardware and software products. This has become a major obstacle in the
progress of systems integration. To improve this situation CAD/CAM users
have called for specification and imple- mentation of standardized
product data interfaces. These needs resulted in the definition of
preliminary standards in this area. Since 1975 activities have been
concentrated on developing standards for three major areas: - computer
graphics, - sculptured surfaces, and - data exchange for engineering
drawings. The Graphical Kernel System (GKS) has been accepted as an
international standard for graphics programming in 1984, Y14.26M (IGES)
was adopted as an American Standard in 1981 and the VDA Surface
Interface (VDAFS) has been accepted by the German National
Standardization Institute (DIN NAM 96.4). Although considerable progress
has been achieved, the complexity of the subject and the dynamics of the
CAD/CAM-development still calls for more generality and compatibility of
the interfaces. This has resulted in an inter- national discussion on
further improvements of the standards. The major goal of this book is to
bring together the different views and experiences in industry and
university in the area of Product Data Interfaces, thereby contributing
to the ongoing work in improving the state of the art.