-*- mode:Text -*-
Copyright 1992 Patrick H. Winston.  All rights reserved.
Version 1.1, transferred from master disk on 21 Jan 93
 
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PURPOSE

Provides program support for the Appendix, Relational Databases.
Illustrates relational database operations using beach data.

PERFORMANCE EXPERIMENT 1

Examine the file rdb.exp.  Run the various relational database
commands by typing the following command to your lisp system:

(load "rdb.exp")

Alternatively, evaluate each Lisp expression in the file one at a
time, noting what each does.

PERFORMANCE EXPERIMENT 2

Change the results by editing the relations in the file
beach.lsp.  Alternatively, create relations and database command
combinations of your own choosing.

MEDIUM-SCALE LISP PROJECT

As it stands, relations are represented as lists, bound to
relation names.  Arrange for the relations to be kept in files;
bind the relation names to file descriptions.