APPENDIX EMetadata Models
Data dictionaries and repositories are specialised information systems used by data managers and those involved in software development, as are the range of systems known as Computer-Aided Software Engineering (CASE) tools. The use of these systems and tools is described in Chapter 11 but, like every other information system, they need a database to store their persistent data. The persistent data that is stored in these specialised information systems is metadata. The models specifying the design of these databases are often known as metadata models.
METADATA MODEL TO RECORD CONCEPTUAL DATA MODELS
Figure E.1 shows a metadata model to support the concepts of conceptual data modelling. It has three major ...