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AS/NZS ISO/IEC 15437:2003 (R2014)

AS/NZS ISO/IEC 15437:2003 (R2014)

Information technology - Open distributed processing - Enhancements to LOTOS (E-LOTOS)

Standards Australia

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Table of Contents

1 -  AS/NZS ISO/IEC 15437:2003 INFORMATION TECHNOLOGY-OPEN DISTRIBUTED PROCESSING-ENHANCEMENTS TO LOTOS (E-LOTOS)
4 -  PREFACE
 5 -  CONTENTS
 11 -  1 Scope
 11 -  2 Conformance
 11 -  3 Normative reference
 11 -  4 Terms, definitions and notation
 12 -  5 E-LOTOS grammar
12 -  5.1 Lexical Structure
12 -  5.1.1 Character set
 13 -  5.1.2 Comments and separators
 13 -  5.1.3 Identifiers
 13 -  5.1.4 Reserved words
 14 -  5.1.5 Identifiers classes
 14 -  5.1.6 Non-terminals classes
 15 -  5.2 Syntax of the language
15 -  5.2.1 Specification
 16 -  5.2.2 Top-level declaration
 16 -  5.2.3 Module body
 16 -  5.2.4 Module expression
 16 -  5.2.5 Module formal parameters
 16 -  5.2.6 Interface expressions
 16 -  5.2.7 Record module expression
 17 -  5.2.8 Interface body
 17 -  5.2.9 Formal parameter list
 17 -  5.2.10 Renaming/Instantiation
 17 -  5.2.11 Equations declaration
 18 -  5.2.12 Simple equations declaration
 18 -  5.2.13 Declarations
 18 -  5.2.14 Expressions
 18 -  5.2.15 Expression Atoms
 19 -  5.2.16 Behaviour expressions
 20 -  5.2.17 Disabling behaviour expression
 20 -  5.2.18 Synchronization behaviour expression
 20 -  5.2.19 Concurrency behaviour expression
 20 -  5.2.20 Selection behaviour expression
 20 -  5.2.21 Suspend/Resume behaviour expression
 20 -  5.2.22 Interleaving behaviour expression
 20 -  5.2.23 Behaviour term
 21 -  5.2.24 Behaviour atom
 22 -  5.2.25 Type expressions
 22 -  5.2.26 Record type expressions
 22 -  5.2.27 Value expressions
 23 -  5.2.28 Record value expressions
 23 -  5.2.29 Patterns
 23 -  5.2.30 Gate parameter list
 23 -  5.2.31 Actual parameter list
 23 -  5.2.32 Exception parameter list
 24 -  5.2.33 Record patterns
 24 -  5.2.34 Behaviour pattern matching
 24 -  5.2.35 Expression pattern matching
 24 -  5.2.36 In parameter list
 24 -  5.2.37 In parameter
 24 -  6 E-LOTOS abstract syntax
24 -  6.1 Overview
25 -  6.1.1 Syntactic sugar
 25 -  6.1.2 Abstract syntax
 26 -  6.2 Concrete to abstract syntactic translation
26 -  6.2.1 Interface body
 28 -  6.2.2 Formal parameter list
 28 -  6.2.3 Declarations
 31 -  6.2.4 Expressions
 31 -  6.2.5 Expression atoms
 34 -  6.2.6 Behaviour expressions
 34 -  6.2.7 Interleaving behaviour expression
 35 -  6.2.8 Behaviour atom
 41 -  6.2.9 Type expressions
 42 -  6.2.10 Record type expressions
 42 -  6.2.11 Record value expressions
 43 -  6.2.12 Gate parameter list
 43 -  6.2.13 Actual parameter list
 43 -  6.2.14 Exception parameter list
 43 -  6.2.15 Record patterns
 44 -  6.2.16 In parameter list
 44 -  6.2.17 In parameter
 45 -  7 E-LOTOS semantics
45 -  7.1 Overview
 46 -  7.2 Static Semantics
46 -  7.2.1 Static semantic objects for Base
 47 -  7.2.2 Judgements on static semantics for Base
 48 -  7.2.3 Extended identifiers
 49 -  7.2.4 Static semantic objects for Modules
 49 -  7.2.5 Judgements on static semantics for Modules
 50 -  7.2.6 Cycle freedom
 50 -  7.2.7 Context morphism
 50 -  7.2.8 Realization
 50 -  7.2.9 Interface Instantiation
 51 -  7.2.10 Interface Matching
 51 -  7.2.11 Renaming/Instantiation
 54 -  7.3 Untimed dynamic semantics
54 -  7.3.1 Untimed dynamic semantic objects for Base
 55 -  7.3.2 Judgements on untimed dynamic semantics for Base
 56 -  7.3.3 Dynamic semantic objects for Modules
 57 -  7.3.4 Judgements on untimed dynamic semantics for Modules
 58 -  7.3.5 Environment morphism
 58 -  7.3.6 Signature Instantiation
 58 -  7.3.7 Renaming/Instantiation
 58 -  7.4 Timed dynamic semantics
59 -  7.4.1 Judgements on timed dynamic semantics
 59 -  7.5 Write-many variables: the value substitution operator
 62 -  8 The E-LOTOS modules
62 -  8.1 Specification
62 -  8.1.1 Specification
 63 -  8.2 Top-level declaration
63 -  8.2.1 Module not constrained by an interface
 63 -  8.2.2 Module constrained by an interface
 64 -  8.2.3 Generic module not constrained by an interface
 65 -  8.2.4 Generic module constrained by an interface
 65 -  8.2.5 Interface declaration
 66 -  8.2.6 Sequential top declaration
 66 -  8.3 Module body
66 -  8.3.1 Block declaration
 67 -  8.3.2 Module Expression
 67 -  8.4 Module expression
67 -  8.4.1 Module aliasing not constrained by an interface
 68 -  8.4.2 Module aliasing constrained by an interface
 68 -  8.4.3 Generic module actualization not constrained by an interface
 69 -  8.4.4 Generic module actualization constrained by an interface
 69 -  8.4.5 Generic module renaming/instantiation
 70 -  8.5 Module formal parameters
70 -  8.5.1 Single
 70 -  8.5.2 Disjoint union
 71 -  8.6 Interface expressions
71 -  8.6.1 Interface identifier
 71 -  8.6.2 Simple renaming
 71 -  8.6.3 Explicit body
 72 -  8.7 Interface body
72 -  8.7.1 Type hiding the implementation
 72 -  8.7.2 Type synonym
 72 -  8.7.3 Constructed type
 73 -  8.7.4 Named record type
 73 -  8.7.5 Process declaration
 74 -  8.7.6 Equations
 74 -  8.7.7 Sequential declaration
 74 -  8.8 Record module expression
74 -  8.8.1 Single
 75 -  8.8.2 Disjoint union
 75 -  8.8.3 Renaming tuple
 75 -  8.9 Equation declarations
75 -  8.9.1 Equations declaration
 76 -  8.9.2 Sequential
 76 -  8.10 Simple equation declaration
 76 -  8.11 Declarations
76 -  8.11.1 Type synonym
 76 -  8.11.2 Type declaration
 77 -  8.11.3 Named record type
 77 -  8.11.4 Process declaration
 78 -  8.11.5 Sequential declarations
 79 -  9 The E-LOTOS base language
79 -  9.1 Introduction
 79 -  9.2 Behaviours
79 -  9.2.1 Disabling behaviour expression
 80 -  9.2.2 Synchronization behaviour expression
 81 -  9.2.3 Concurrency behaviour expression
 83 -  9.2.4 Selection behaviour expression
 83 -  9.2.5 Suspend/Resume behaviour expression
 84 -  9.2.6 Sequential composition
 85 -  9.2.7 Action
 86 -  9.2.8 Internal action
 86 -  9.2.9 Succesful termination without values
 86 -  9.2.10 Succesful termination
 87 -  9.2.11 Inaction
 87 -  9.2.12 Time block
 87 -  9.2.13 Delay
 88 -  9.2.14 Assignment
 88 -  9.2.15 Nondeterministic Assignment
 89 -  9.2.16 Choice over values
 90 -  9.2.17 Trap
 91 -  9.2.18 General parallel
 93 -  9.2.19 Parallel over values
 94 -  9.2.20 Variable declaration
 94 -  9.2.21 Gate hiding
 95 -  9.2.22 Renaming
 97 -  9.2.23 Process instantiation
 97 -  9.2.24 loop iteration
 98 -  9.2.25 Case
 98 -  9.2.26 Case with tuples
 99 -  9.2.27 Signalling
 100 -  9.3 Type expressions
100 -  9.3.1 Type identifier
 100 -  9.3.2 Empty type
 100 -  9.3.3 Universal type
 100 -  9.3.4 Record type
 101 -  9.4 Record type expressions
101 -  9.4.1 Singleton record
 101 -  9.4.2 Universal record
 101 -  9.4.3 Record disjoint union
 102 -  9.4.4 Empty record
 102 -  9.5 Value expressions
102 -  9.5.1 Primitive constants
 102 -  9.5.2 Variables
 102 -  9.5.3 Record values
 103 -  9.5.4 Constructor application
 103 -  9.6 Record value expressions
103 -  9.6.1 Singleton record
 103 -  9.6.2 Record disjoint union
 103 -  9.6.3 Empty record
 104 -  9.7 Patterns
104 -  9.7.1 Record pattern
 104 -  9.7.2 Wildcard
 104 -  9.7.3 Variable binding
 105 -  9.7.4 Expression pattern
 105 -  9.7.5 Constructor application
 106 -  9.7.6 Explicit typing
 106 -  9.8 Record patterns
107 -  9.8.1 Singleton record pattern
 107 -  9.8.2 Record wildcard
 107 -  9.8.3 Record match
 108 -  9.8.4 Record disjoint union
 108 -  9.8.5 Empty record pattern
 108 -  9.9 Record of variables
108 -  9.9.1 Singleton record variable
 108 -  9.9.2 Record disjoint union
 109 -  9.10 Behaviour pattern-matching
109 -  9.10.1 Single match
 110 -  9.10.2 Multiple match
 110 -  10 Predefined library
111 -  10.1 Booleans
 113 -  10.2 Natural Numbers
 116 -  10.3 Integral Numbers
 119 -  10.4 Rational Numbers
 122 -  10.5 Floating Point Numbers
 123 -  10.6 Characters
 124 -  10.7 Strings
 124 -  10.8 Enumerated Type Scheme
 126 -  10.9 Record Type Scheme
 127 -  10.10 Set Type Scheme
 130 -  10.11 List Type Scheme
 132 -  Annex A - Tutorial
132 -  A.1 The base language
 155 -  A.2 The module language
 166 -  A.3 An E-LOTOS specification of the ODP trader
 189 -  Annex B - Guidelines for LOTOS to E-LOTOS translation
189 -  B.1 Introduction
 196 -  Bibliography

Abstract

Defines the syntax and semantics of the enhanced LOTOS language, named E-LOTOS. E-LOTOS is used for the formal descritpion of the behavioural aspects of distributed and concurrent systems in general and in the area of open distributed processing in particular.

RECONFIRMATION NOTICE
Technical Committee IT-015 has reviewed the content of this publication and in accordance
with Standards Australia procedures for reconfirmation, it has been determined that the
publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original
date of publication. Users are advised to ensure that they are using the latest versions of
such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for
reconfirmation on 17 March 2014.
The following are represented on Technical Committee IT-015:
Australian Computer Society
Australian Society for Technical Communication (NSW)
Charles Sturt University
Department of Defence (Australia)
Griffith University
La Trobe University
National Association of Testing Authorities Australia
National ICT Australia
NSW Business Chamber
Quantitative Enterprise Software Performance
Systems Engineering Society of Australia
University of Technology, Sydney

Scope

This International Standard defines the syntax and semantics of the enhanced LOTOS language (ISO 8807), named E-LOTOS. E-LOTOS is used for the formal description of the behavioural aspects of distributed and concurrent systems in general and in the area of open distributed processing in particular.

General Product Information

Document Type Standard
Status Current
Publisher Standards Australia
ProductNote Reconfirmed 20/05/2014.
This standard has been reconfirmed in Australia in 2014 and remains current in New Zealand.
Reconfirmation Notice 20/05/2014
Committee IT-015
Supersedes
  • DR 03092 CP

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