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SHORT DESCRIPTION

A backward chaining or goal driven expert system


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ASSET PROFILE

UNIT NAME
EXPERT
VERSION
1.0
REVIEW CODE
AR; C1 1.0 A
INET ADDRESS
N/A
AUTHOR
Alan McDonley
Texas Instruments
RIGHTS
PUBLIC DOMAIN
COPYRIGHT
Not documented in PAL database
DATE CREATED
11 Sep 85
DATE RELEASED
3 Dec 85
DATE LAST UPDATED
3 Dec 85
LOCATION
ASR
PAL
AdaNET
ENVIRONMENT
VAX 11/785, VMS 4.1, DEC Ada
LIMITATIONS
Not documented in PAL database
CERTIFICATION
Ada System Certifier_1 1.0
Date/Time of Processing: Wednesday 25 May       1994 05:05:55Pm
Overall Assessment of System: OK
Classification of System: A
Basis of Classification --
Syntax Errors                               PASS
Completeness                                PASS
Independence from External Libraries        PASS
Independence from a Specific Ada Compiler   PASS

Number of ...
Files               1
Library Units       3
Lines            1048
Statements        400
Comments          375

FILE LISTING

Directory Display


languages/ada/asr/ai/expert:
  File Name                 Size
  ---------                 ----
  expert.zip              12,321


Totals
  ==============  ==============
    1 Files               12,321

ABSTRACT

        EXPERT  is  a  backward chaining or goal driven expert system.
It is based on two articles, first Sept 1981 BYTE (Duda and  Gaschnig)
published  the  expert  system in BASIC skirting the use of recursion,
second Jan/Feb 85 issue of JOURNAL OF PASCAL,ADA, & MODULA-2  (Darrell
Morgeson)  published  in  Modula-2  with  recursion  implemented.  The
listing had one logic error which caused pointer explosion on the last
hypothesis  in  the  GETRULE routine.  This implementation follows the
MODULA-2 design completely and was not designed from the ground up  in
Ada.


REVISION HISTORY

DATE         VERSION	AUTHOR                  HISTORY
12/3/85      1.0     Alan McDonley           Initial Release


RELEASE NOTICE

This prologue must be included in all copies of this software.

This software is released to the Ada community.
This software is released to the Public Domain (note:
  software released to the Public Domain is not subject
  to copyright protection).
Restrictions on use or distribution:  NONE


DISCLAIMER

	This software and its documentation are provided "AS IS" and
without any expressed or implied warranties whatsoever.  No warranties
as to performance, merchantability, or fitness for a particular
purpose exist.
	The user is advised to test the software thoroughly before
relying on it.  The user must assume the entire risk and liability of
using this software.  In no event shall any person or organization of
people be held responsible for any direct, indirect, consequential or
inconsequential damages or lost profits.