期刊名称：Journal of Information and Organizational Sciences
印刷版ISSN：1846-3312
电子版ISSN：1846-9418
出版年度：2002
卷号：26
期号：1-2
页码：69-84
出版社：Faculty of Organization and Informatics University of Zagreb
摘要：The notion of a subschema, as a formal and abstract definition of data, constraints, and database update activities that are needed to make a transaction program, is introduced in the paper. A subschema is designed with respect to a user requirement and an existing relational database schema. A subschema design is done in the course of a transaction program design. Establishing methods for the design of a transaction program specification asks for a definition of a general and formal structure of that program. Our recent research shows that this goal may be achieved by means of XML specifications. Using XML specifications provides an automatic procedure for generating an executable specification of a transaction program. In the paper we present a formal way to describe the structure of a subschema by means of XML. This description supports SQL subschema specification using concepts of ANSI SQL92 standard.
关键词：Relational Database Schema; Transaction Program Specification; Subschema; XML Specification
