Specification of Reactive Hardware/Software Systems - Electronic ...

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456 Summary The research has been performed in a joint project resulting in a combined doctoral thesis. Van der Putten focused on modelling concepts and the definition of the method and its framework. Voeten focused on the development of the description language POOSL, its formal semantics and a system of proven behaviour-preserving transformations. The result of this joint effort is a specification and design philosophy that integrates formal and informal modelling of reactive systems in an object-oriented fashion. The method is applied to an industrial case. This case involves the development of a generic specification of an industrial mailing machine. The specification is developed in a joint research project of the TUE (Information and Communication Systems), Buhrs-Zaandam bv, and TNO-TPD. The project has been granted a subsidy of the Ministry of Economic Affairs in the framework of ’Informatietechnologieprogramma’s 1995.’
Samenvatting Dit gecombineerde proefschrift beschrijft een methode voor co-specificatie en ontwerp van gedistribueerde reactieve real-time hardware/softwaresystemen. Voorbeelden van dergelijke systemen zijn tele- en datacommunicatienetwerken en schakelcentrales, industriële besturingssystemen, ’embedded’ systemen en consumentenelektronica. De complexiteit van dergelijke systemen is tegenwoordig zover toegenomen dat het ontwikkelen ervan grote risico’s met zich meebrengt. Naast het probleem van complexiteit kampt men ook met steeds hogere eisen op het gebied van kwaliteit, duurzaamheid, veiligheid en betrouwbaarheid. Functionaliteit wordt geïmplementeerd in een mengvorm van parallelle hardware- en softwaremodules met een zeer ingewikkeld communicatiegedrag. Het is onmogelijk om dergelijke systemen snel genoeg te ontwikkelen zonder de hulp van geschikte methoden en gereedschappen. Er zijn onvoldoende methoden die zich richten op het ontwerpen op systeemniveau. Daarom is gekozen voor onderzoeken op het gebied van hardware/software co-specificatie. Dit gebied richt zich op specificatie en ontwerp op systeemniveau. Het gebied is complementair aan hardware/software co-design, dat zich richt op het implementatieniveau, en met name op hardware/software co-simulatie. Dit proefschrift introduceert de methode ’Software/Hardware Engineering’ (SHE). Deze methode omvat een omgeving voor ontwerpactiviteiten en een formele beschrijvingstaal genaamd POOSL (Parallel Object-Oriented Specification Language). Na een eerste fase van objectgeoriënteerde analyse en architectuurontwerp produceert de methode een robuuste beschrijving van zowel structuur als dynamisch gedrag van een systeem. In tegenstelling tot informele methoden heeft SHE de potentie om simulatie, formele verificatie, structuurtransformaties, en automatische vertaling naar implementatie te bieden. Dit proefschrift richt zich meer op de fundamenten van de methode dan op de methode zelf. De methode is gebaseerd op: de ’event/response’ benadering uit de traditie van ’Structured Analysis & Structured Design’; communicatie met berichten en classificatie volgens het objectgeoriënteerde paradigma; concepten voor formele beschrijving en voor bewezen structuurtransformaties; modellering van parallelle processen en diverse soorten communicatie; simuleerbare dynamische gedragsbeschrijvingen en op een taal met een formele semantiek; een multidisciplinaire benadering. 457
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Specification of Reactive Hardware/
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to Leny, Inge and our parents
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Contents Acknowledgements v 1 Intro
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CONTENTS ix 4.6.5 Aggregate Semanti
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CONTENTS xi 6 Modelling of Concurre
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CONTENTS xiii 6.6.7.2 System Specif
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CONTENTS xv 11.4.2.3 Requirements C
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List of Figures 1.1 Chapter Overvie
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LIST OF FIGURES xix 6.16 Strongly D
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Chapter 1 Introduction 1.1 Objectiv
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1.1 Objectives 3 understood and sti
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1.1 Objectives 5 Informal and Forma
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1.2 Thesis Organisation 7 Chapter 1
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1.2 Thesis Organisation 9 Recommend
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Chapter 2 On Specification of React
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2.3 Specifications, Models and View
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2.4 Specification Languages, Formal
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2.4 Specification Languages, Formal
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2.5 Modelling Concepts 23 entirety.
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2.5 Modelling Concepts 25 Tradition
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2.6 Activity Frameworks for Specifi
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2.6 Activity Frameworks for Specifi
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2.7 Summary 31 offer many guideline
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Chapter 3 Concepts for Analysis, Sp
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3.3 Concepts 35 3. creation of a sy
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3.5 Combining Compatible Concepts 3
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3.6 Practical Use of Concepts 39 3.
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3.6 Practical Use of Concepts 41 Th
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3.6 Practical Use of Concepts 43 ac
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3.6 Practical Use of Concepts 45 ac
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3.6 Practical Use of Concepts 47 wa
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3.6 Practical Use of Concepts 49 Ge
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3.6 Practical Use of Concepts 51 Re
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3.7 Summary and Concluding Remarks
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Chapter 4 Abstraction of a Problem
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4.1 Introduction 57 earlier phase t
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4.2 Objects 59 An object can mean t
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4.2 Objects 61 wonder what other ob
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4.3 Classes 63 A message interface
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4.3 Classes 65 Class B Attributes M
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4.4 Data Objects and Process Object
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4.5 Clusters 79 flows. Clusters ena
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4.6 Aggregates 81 Therefore a compl
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4.6 Aggregates 83 4.6.4 Clustered A
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4.6 Aggregates 85 An old philosophi
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4.7 Identity and Object Identifiers
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4.8 Properties of Composites 89 for
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4.8 Properties of Composites 91 com
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4.8 Properties of Composites 93 Whe
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4.8 Properties of Composites 95 In
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4.9 Channel Hiding 97 Servant A Sup
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4.11 Composites and Hierarchies 99
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4.12 Object Variety 101 Part class
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4.13 Object Class Models 103 Anothe
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4.13 Object Class Models 105 of obj
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4.14 Attributes and Variables 107 c
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4.14 Attributes and Variables 109 4
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4.15 Operations, Services, Methods
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4.15 Operations, Services, Methods
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4.17 Summary 115 Accidental Propert
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Chapter 5 Concepts for the Integrat
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5.2 Architecture 119 Requirements D
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5.3 Design Philosophy 121 this. The
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5.4 Essential Model and Extended Mo
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5.4 Essential Model and Extended Mo
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5.6 Architecture and Implementation
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5.7 Views 129 Management £ £ £ P
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5.7 Views 131 Behaviour Behaviour U
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5.8 Boundaries 133 5.8 Boundaries 5
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5.8 Boundaries 135 x x Object A y z
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5.8 Boundaries 137 x w w x Object A
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5.8 Boundaries 139 In Chapter 10 we
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5.9 Transformations 141 The modific
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5.10 Formalisation 143 Level 1 Leve
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5.11 Summary 145 Behaviour Requirem
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Chapter 6 Modelling of Concurrent R
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6.2 Concurrency and Synchronisation
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6.3 Communication 157 between proce
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6.3 Communication 159 or to transfo
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6.3 Communication 161 6.3.3.4 Messa
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6.3 Communication 163 Synchronous m
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6.3 Communication 165 channel-name
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6.3 Communication 167 can be descri
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6.3 Communication 169 statement aft
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6.3 Communication 171 (normalCourse
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6.3 Communication 173 ∞ client re
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6.3 Communication 175 There is a gr
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6.3 Communication 177 process A pro
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6.3 Communication 179 Clocks An int
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6.3 Communication 181 whether the s
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6.3 Communication 183 6.3.9.4 Model
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6.3 Communication 185 6.3.10.2 Desc
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6.4 Distribution 187 force to take
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6.4 Distribution 189 is that the in
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6.4 Distribution 191 links to each
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6.4 Distribution 193 6.4.6 Distribu
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6.5 Scenarios 195 entities. This su
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6.5 Scenarios 197 startJob readyToA
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6.5 Scenarios 199 collection of tex
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6.6 Dynamic Behaviour 201 selection
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6.6 Dynamic Behaviour 203 processes
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6.6 Dynamic Behaviour 205 even for
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6.6 Dynamic Behaviour 207 with the
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6.6 Dynamic Behaviour 209 6.6.4 Sep
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6.6 Dynamic Behaviour 211 6.6.5 Mod
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6.6 Dynamic Behaviour 213 to pay at
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6.6 Dynamic Behaviour 215 A method
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6.6 Dynamic Behaviour 217 to happen
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6.6 Dynamic Behaviour 219 c a Multi
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6.6 Dynamic Behaviour 221 but not t
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6.7 Real-Time Modelling 223 claimed
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6.7 Real-Time Modelling 225 in the
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6.8 Summary 227 They can graphicall
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Chapter 7 Introduction to the Seman
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7.2 A Brief Language Characterisati
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7.3 The Role of Semantics 233 7.3 T
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7.4 Mathematical Preliminaries 235
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7.4 Mathematical Preliminaries 237
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7.5 Concluding Remarks 239 0 ¡ Bin
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Chapter 8 Data Part of POOSL Chapte
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8.3 Formal Syntax 243 runk, and cun
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8.4 Context Conditions 245 Further,
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8.5 A Computational Semantics 247 T
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8.5 A Computational Semantics 249 w
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8.5 A Computational Semantics 251 s
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8.6 Primitive deepCopy Messages 253
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8.6 Primitive deepCopy Messages 255
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8.7 Example: Complex Numbers 257 is
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8.8 Summary and Concluding Remarks
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Chapter 9 Process Part of POOSL Cha
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9.3 Formal Syntax 263 In almost any
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9.3 Formal Syntax 265 The fourth st
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9.3 Formal Syntax 267 call of the f
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9.4 Context Conditions 269 We are n
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9.5 A Computational Interleaving Se
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9.6 Example: A Simple Handshake Pro
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9.7 The Development of POOSL 291 is
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9.7 The Development of POOSL 293 da
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9.7 The Development of POOSL 295 e
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9.7 The Development of POOSL 297 Em
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9.7 The Development of POOSL 299 (o
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9.8 Summary 301 To prepare the deve
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Chapter 10 Behaviour-Preserving Tra
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10.2 Instance Structure Diagrams 30
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10.2 Instance Structure Diagrams 30
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10.3 Some Properties of Transformat
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10.4 A System of Basic Transformati
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10.5 Example: The Elevator Problem
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10.7 On the Fundamental Limitations
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10.7 On the Fundamental Limitations
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10.8 Summary 331 are transformation
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Chapter 11 SHE Framework Chapter 1
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11.2 SHE Context and Phases 335 Inf
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11.2 SHE Context and Phases 337 a p
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11.2 SHE Context and Phases 339 11.
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11.3 SHE Framework 341 the system.
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11.4 Essential Specification Modell
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11.5 Extended Specification Modelli
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Chapter 12 Case Study Chapter 1 Cha
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12.2 Initial Requirements Descripti
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12.3 The Essential Specification 37
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12.4 Towards an Extended Specificat
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12.5 Concluding Remarks 399 i1 DIST
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12.5 Concluding Remarks 401 Feeder
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Chapter 13 Conclusions and Future W
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Page 429 and 430: 13.4 Related Results 409 The notion
Page 431 and 432: Appendix A The POOSL Transition Sys
Page 433 and 434: A.1 The Data Part of POOSL 413 (12)
Page 435 and 436: A.2 The Process Part of POOSL 415 A
Page 437 and 438: A.2 The Process Part of POOSL 417 (
Page 439 and 440: A.2 The Process Part of POOSL 419 (
Page 441 and 442: A.2 The Process Part of POOSL 421 i
Page 443 and 444: Appendix B Proofs of Propositions a
Page 445 and 446: Proofs of Propositions and Transfor
Page 455 and 456: Appendix C Glossary of Symbols This
Page 457 and 458: Glossary of Symbols 437 267 Cp ¥¡
Page 459 and 460: References [AB90] P. America and F.
Page 461 and 462: REFERENCES 441 [C [C [C 86] B. Cohe
Page 463 and 464: REFERENCES 443 [Her90] A.J.H. Herbe
Page 465 and 466: REFERENCES 445 [MV93] S. Mauw and G
Page 467 and 468: REFERENCES 447 [vE89] P. van Eijk.
Page 469 and 470: Index abort, 297 abstract action so
Page 471 and 472: INDEX 451 strong, 190, 293 subsyste
Page 473 and 474: INDEX 453 delay, 178 do-statement,
Page 475: Summary This combined thesis descri
Page 479: Curricula Vitae Piet van der Putten
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