-*- mode:Text -*-
Copyright 1992 Patrick H. Winston.  All rights reserved.
Version 1.1.1, transferred from master disk on 23 Apr 93
 
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WARNING

AKCL and KCL users may need to delete the final line in the
tools.exp file, the one that reads as follows:

(run-interface)

For some reason, you need to type this line yourself, rather
than just including it in the tools.exp file.

PURPOSE

Provides program support for Chapter 29, Responding to Questions
and Commands.  Illustrates Natural language database query using
tools.

PERFORMANCE EXPERIMENT 1

Examine the file tools.exp.  Start natural language interface
by typing the following command to your lisp system:

(load "tools.exp")

Then ask various questions, perhaps starting with the following:

Show me the tools.
What are the long tools.
What are the sizes of the screwdrivers.
Rank the tools by quality.

Once you have loaded tools.exp, and subsequently exited from the
natural language interface, you can reactivate the interface by
typing the following command:

(tools)

PERFORMANCE EXPERIMENT 2

Change the results by editing the relations in the file
tools.lsp.

KNOWLEDGE ENGINEERING EXPERIMENT 1

Connect the natural language interface to a database describing
your local restaurants.

KNOWLEDGE ENGINEERING EXPERIMENT 2

Generalize the natural language interface by modifying the
grammar to accept sentences of the following form:

What sizes are the screwdrivers?
What is the average size of the screwdrivers?

MEDIUM-SCALE LISP PROJECT

Modify the grammar compiler so that grammars can contain
asterisks (*), meaning ``Any number of words, including none, can
go here.''

Use the added functionality to implement a program that handles
dialogs such as those made famous by the DOCTOR program (also known
as Eliza).  The DOCTOR program pretended it was a psychiatrist:

Patient:  I am worried about grades.
Doctor:	  How long have you worried about grades?

Patient:  For two months.
Doctor:   Does the number TWO have special significance to you?