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270 Process Part of POOSL (2’) All class names in Sys p are different. (3’) All instance variable names in a process-class definition are different. (4’) All method names within a single process class are different. (5’) All parameter and local variable names defined in a method definition are different. (6’) Every variable used in a method body is either an instance variable of the corresponding process class, a method parameter, or a local method-variable. (7’) No method body has expression self as its constituent. (8’) An expression contained in an initial method call does not contain any local variables or self expressions. (9’) All instance variables specified between angle brackets in a process class definition are different. Further, each of these variables is member of the set of all instance variables of the class. (10’) The set of communication channels as well as the message interface defined in a class definition conform to the corresponding instance methods or behaviour specification. (This condition is formally defined in Subsection 9.5.2.) (11’) For every method call statement there exists a corresponding method definition. (12’) For every C pc (PE1 ¥¡ ¡ ¡ ¥ PEr) used as part of the behaviour expression of some cluster class, there exists a corresponding class definition. Further, C pc (PE1 ¥¡ ¡ ¡ ¥ PEr) does not contain any variables or self expressions. (13’) Every expression parameter used in a parameterised behaviour expression is defined as expression parameter of the corresponding cluster class. (14’) Parameterised behaviour specifications of cluster classes are not defined (mutual) recursively. Conditions concerning the combination of BSpec and Sys p (15’) For every C pc (E1 ¥¡ ¡ ¡ ¥ Er) used as part of BSpec, there exists a corresponding class definition in Sys p . Further no expression Ei contains variables or self . In the remainder of this chapter it will be assumed that SSpecifications denotes the set of system specifications that satisfy the above context conditions.
9.5 A Computational Interleaving Semantics 271 9.5 A Computational Interleaving Semantics 9.5.1 Informal explanation The process-oriented part of POOSL will be formalised by means of a computational interleaving semantics. The semantics is specified by a labeled-transition system. A labeledtransition system is very similar to a ’normal’ transition system as described in Subsection 8.5.1. It is represented by an ensemble (Conf p £ a £ ¡ a ¡ Act¦ ) where Conf ¥ Act¥ p is a set of configurations, Act is a set of atomic actions, and £ ¡ a ¡ Act¦ a is a set of £ labeledtransition relations. If and S¥ I I¡ are configurations, then the intuitive meaning of ¥ S¡ a £ S¡ ¥ I¡ is that a system S with an amount of information I can lead to system S¡ S¥ I I¡ and information in a single transition step by performing atomic action a. The execution of a system of collaborating instances is modelled as the interleaving of all atomic actions, that is, as a sequential execution of these actions. 9.5.2 Definitions The labeled-transition system will be based upon configurations of the form ¥ e ¥ BSpec ¥ ¡ ¡ 1 ¥ ps1 ¥ n ¥ n psn Sys ¡ p Sys ¥ Here BSpece denotes the system part (comparable to the statement (S) part in Subsection 8.5.1) of ¡ ¡ the ¥ configuration ¥ 1 and ¡ ¡ 1 ps1 , , ¡ n ¥ n psn , ¡ Sys ¥ p and Sys together form the information part (the I part in Subsection 8.5.1 ). ¡ 1 ¥¡ ¡ ¡ ¥ BSpec e is an extended behaviour specification. The set BSpecifications e denotes the set of all extended behaviour-specifications and is defined as BSpec e :: C p (E1 ¥¡ ¡ ¡ ¥ Er) ¡ C c (E1 ¥¡ ¡ ¡ ¥ Er) ¡ § S p£ e C p E1£ ¡ ¡ ¡ £ Er¢ § BSpec ¡ e C c ¡ ¡ ¡£ Er¢ E1£ BSpec ¡ e 1 ¢ BSpece ¡ 2 BSpece L BSpec ¡ e f § Cp ¥¡ ¡ ¡ ¥ (E1 Er) and Cc ¥¡ ¡ ¡ ¥ (E1 Er) denote an instance of some process class Cp ¥¡ ¡ ¡ ¥ yr y1 and some cluster class Cc ¥¡ ¡ ¡ ¥ Pr P1 respectively, initialised to ¥¡ ¡ ¡ ¥ E1 § Er. Sp£ e Cp ¡ ¡ ¡£ Er¢ E1£ denotes that extended process statement Sp£ e still has to be executed by process instance Cp ¥¡ ¡ ¡ ¥ (E1 § Er). BSpece C c ¡ ¡ ¡£ Er¢ indicates that behaviour expression BSpec E1£ e remains to be executed by cluster Cc ¥¡ ¡ ¡ ¥ (E1 Er). The other constructs denote parallel composition, channel hiding, and channel renaming respectively. ¡ ¥ 1 ¥ 1 ps1 ¡ ¡ , , ¡ ¡ ¥ n ¥ n psn is a list of process environments, one for each ¡ initialised process object of BSpece . A process environment ¡ ps¥ is composed of a variables ¡ ¥ state , a local process stack ps, and a type ¡ ¡ .
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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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Page 251 and 252: 7.2 A Brief Language Characterisati
Page 253 and 254: 7.3 The Role of Semantics 233 7.3 T
Page 255 and 256: 7.4 Mathematical Preliminaries 235
Page 257 and 258: 7.4 Mathematical Preliminaries 237
Page 259 and 260: 7.5 Concluding Remarks 239 0 ¡ Bin
Page 261 and 262: Chapter 8 Data Part of POOSL Chapte
Page 263 and 264: 8.3 Formal Syntax 243 runk, and cun
Page 265 and 266: 8.4 Context Conditions 245 Further,
Page 267 and 268: 8.5 A Computational Semantics 247 T
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Page 273 and 274: 8.6 Primitive deepCopy Messages 253
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Page 277 and 278: 8.7 Example: Complex Numbers 257 is
Page 279 and 280: 8.8 Summary and Concluding Remarks
Page 281 and 282: Chapter 9 Process Part of POOSL Cha
Page 283 and 284: 9.3 Formal Syntax 263 In almost any
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Page 287 and 288: 9.3 Formal Syntax 267 call of the f
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Page 311 and 312: 9.7 The Development of POOSL 291 is
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Page 315 and 316: 9.7 The Development of POOSL 295 e
Page 317 and 318: 9.7 The Development of POOSL 297 Em
Page 319 and 320: 9.7 The Development of POOSL 299 (o
Page 321 and 322: 9.8 Summary 301 To prepare the deve
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Page 325 and 326: 10.2 Instance Structure Diagrams 30
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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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13.2 P.H.A. van der Putten’s Cont
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13.2 P.H.A. van der Putten’s Cont
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13.4 Related Results 409 The notion
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Appendix A The POOSL Transition Sys
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A.1 The Data Part of POOSL 413 (12)
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A.2 The Process Part of POOSL 415 A
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A.2 The Process Part of POOSL 417 (
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A.2 The Process Part of POOSL 419 (
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A.2 The Process Part of POOSL 421 i
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Appendix B Proofs of Propositions a
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Proofs of Propositions and Transfor
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Appendix C Glossary of Symbols This
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Glossary of Symbols 437 267 Cp ¥¡
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References [AB90] P. America and F.
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REFERENCES 441 [C [C [C 86] B. Cohe
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REFERENCES 443 [Her90] A.J.H. Herbe
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REFERENCES 445 [MV93] S. Mauw and G
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REFERENCES 447 [vE89] P. van Eijk.
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Index abort, 297 abstract action so
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INDEX 451 strong, 190, 293 subsyste
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INDEX 453 delay, 178 do-statement,
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Summary This combined thesis descri
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Samenvatting Dit gecombineerde proe
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Curricula Vitae Piet van der Putten
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