flex Expert System Toolkit - LPIS

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The contents of this manual describe the product, flex 1.2, and are believed correct at time of going to press. They do not embody a commitment on the part of Logic Programming Associates (LPA), who may from time to time make changes to the specification of the product, in line with their policy of continual improvement. No part of this manual may be reproduced or transmitted in any form, electronic or mechanical, for any purpose other than the licensee's personal use without the prior written agreement of LPA. Copyright © Logic Programming Associates Ltd, 1989, 1990, 1992, 1996. flex was designed and written by Phil Vasey, Logic Programming Associates Ltd.
Welcome to the flex expert system toolkit. Flex was originally developed by LPA in 1988 as a Prolog-based toolkit for LPA Prolog programmers using MS-DOS. Since then it has matured into a general purpose expert systems toolkit, and has been ported to many different hardware and software environments. Flex has been widely used in industry and research in various applications such as modelling and simulation, legal reasoning, expert advisory systems, scheduling, planning, and diagnostics. Flex is licensed to ICL/TeamWare as part of the TeamWare/ProcessWise portfolio of Business Process Management range of software products, and has been used in various re-engineering projects in the UK and overseas. Flex has been licensed to the Open University in the UK for re-distribution to students enrolled on their course, "T396: Artificial Intelligence for Technology".
Page 1: flex Reference By Dave Westwood
Page 6 and 7: Contents 4 Contents Contents 4 1. I
Page 8 and 9: Contents 6 KSL Sentences 81 Frames
Page 10 and 11: Contents 8 Variant 196 Set 197 Gene
Page 12 and 13: 1. Introduction 10 Forward Chaining
Page 14 and 15: 2. Frames and Inheritance 12 2. Fra
Page 16 and 17: 2. Frames and Inheritance 14 Defaul
Page 18 and 19: 2. Frames and Inheritance 16 flex t
Page 20 and 21: 2. Frames and Inheritance 18 define
Page 22 and 23: 2. Frames and Inheritance 20 employ
Page 24 and 25: 2. Frames and Inheritance 22 Inheri
Page 26 and 27: 2. Frames and Inheritance 24 Depth-
Page 28 and 29: 2. Frames and Inheritance 26 Univer
Page 30 and 31: 2. Frames and Inheritance 28 The fl
Page 32 and 33: 3. Forward Chaining 30 the axioms a
Page 34 and 35: 3. Forward Chaining 32 flex toolkit
Page 36 and 37: 3. Forward Chaining 34 A Simple Mod
Page 38 and 39: 3. Forward Chaining 36 The basic cy
Page 40 and 41: 3. Forward Chaining 38 First Come F
Page 42 and 43: 3. Forward Chaining 40 considered.
Page 44 and 45: 4. Data-Driven Programming 42 data-
Page 46 and 47: 4. Data-Driven Programming 44 Const
Page 48 and 49: 4. Data-Driven Programming 46 • c
Page 50 and 51: 4. Data-Driven Programming 48 conte
Page 52 and 53: 5. Questions And Answers 50 Rather
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5. Questions And Answers 52 Customi
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5. Questions And Answers 54 answer
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6. Anatomy of a flex Program 56 ?-
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6. Anatomy of a flex Program 58 fle
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6. Anatomy of a flex Program 60 and
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7. Knowledge Specification Language
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8. Run-Time Interpretation of KSL 1
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9. Flex Predicates 120 9. flex Tool
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9. Flex Predicates 122 ask( +Name )
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9. Flex Predicates 124 flex toolkit
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9. Flex Predicates 126 every_instan
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9. Flex Predicates 128 forward_chai
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9. Flex Predicates 130 Examples fle
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9. Flex Predicates 132 are : Search
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9. Flex Predicates 134 isa_demon( ?
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9. Flex Predicates 136 Example ?- i
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9. Flex Predicates 142 new_group( +
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9. Flex Predicates 144 one of the f
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9. Flex Predicates 146 new_synonym(
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9. Flex Predicates 148 the agenda.
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9. Flex Predicates 150 Examples rem
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9. Flex Predicates 152 remove_quest
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9. Flex Predicates 154 spied_chain
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9. Flex Predicates 156 If the exist
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11. Example - Robbie Goes Shopping
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Appendix A - Examples 166 Appendix
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tail Appendix A - Examples 168 herb
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Appendix A - Examples 170 Represent
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Appendix A - Examples 172 The Ident
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Appendix A - Examples 174 Example 2
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Appendix A - Examples 176 The Rules
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Appendix A - Examples 178 group sta
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Appendix B - Formal Definition of K
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Appendix C - KSL Keyword Glossary 2
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Appendix D - Dealing with Uncertain
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Index 232 — GENERAL INDEX — —
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Index 234 cycle, 111 cycle/3, 106 c
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Index 236 attribute of, 51 child, 7
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Index 238 isa_exception/1, 117 isa_
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Index 240 Ordering, 58, 59, 88, 105
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Index 242 create, 128 disabling of,
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Index 244 Updating agenda, 29, 74 U
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Index 246 false, 180, 193 first, 72
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Index 248 —flex PREDICATES INDEX
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Index 250 run_data/0, 137 run_data/
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