Abstract
In expanding from an application-oriented hierarchical database model information system to a system integrated with information-oriented relational database model, IBM offers its IMS/DB2 dual database strategy. There are also other non-IBM database technologies challenging DB2 as the only alternative for IMS installation. Automobile industries themselves are going through such a transition in developing their fourth-generation information systems. A couple major automobile corporations with IMS-based information systems are brought up as examples. These corporations have developed their design strategies and system architectures. Such an integration has influence upon the operating environment and the decision support for the end-user-driven information retrieval applications.
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