Disertation Abstracts Selected by Susanne Humphrey AN University Microfilms Order Number ADG87-27184. AU ABRAMS, DAVID HOWARD. IN Georgia Institute of Technology D.B. 1987, 220 pages. TI A REFERENCE MODEL FOR HETEROGENEOUS DATA BASE MANIPULATION AND AN EXPERT SYSTEM PROTOTYPE FOR HOMOGENOUS DATA BASE MANIPULATION. SO DAI V48(09), SecB. DE Computer Science. AB A reference model for heterogeneous database manipulation (HDBM) is presented. The model provides a generalized approach for allowing applications software to perform data manipulation on centralized or distributed heterogeneous database systems. The HDBM model has been developed using layering and techniques similar to those used in the International Standards Organization's reference model for open systems intercormection. A working prototype system, based on the HDBM model and called the Integrated Data Delivery Expert (IDDE), was developed as a series of layers using rapid prototyping methodology and expert systems technology. The IDDE serves as a front-end system for manipulating data in a distributed, relational, database system environment. The IDDE software is developed as four layers: applications interface; data presentation services module; data control services module; and database services module. The IDDE model was tested by retrieval of data from database systems that are accessible to it. \ The
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