|
Abstract : |
The EcrinsDesign system is a graphical tool for data schema design. It is based on the Ecrins semantic data model. It supports interactive data schema design by direct manipulation of graphical objects. Its main contribution is the definition and the management of the dynamic aspects of the graphical representation: the type of each object may evolve, depending on the user?s actions and conforming to a set of integrity rules. The legibility of the edited schemas, the flexibility and the high level of interaction are the main characteristics of the system. Moreover, the system is composed of an Ecrins Data Definition Language generator, enabling the communication with the target Ecrins/BD DBMS, which implements the Ecrins data model. The EcrinsDesign system is implemented in Think C ? on the Apple Macintosh ? II family computers. 1, |
