ISO/IEC 19502:2005

Information technology — Meta Object Facility (MOF)

ISO/IEC 19502:2005 defines a metamodel (defined using Meta Object Facility, MOF), a set of interfaces [defined using Open Distributed Processing (ODP) Interface Definition Language (IDL) (ITU-T Recommendation X.920 (1997) | ISO/IEC 14750:1999)], that can be used to define and manipulate a set of interoperable metamodels and their corresponding models. ISO/IEC 19502:2005 also defines the mapping from MOF to ODP IDL. These interoperable metamodels include the Unified Modeling Language (UML) metamodel (ISO/IEC 19501:2005), the MOF meta-metamodel, as well as future standard technologies that will be specified using metamodels. The MOF provides the infrastructure for implementing design and reuse repositories, application development tool frameworks, etc. The MOF specifies precise mapping rules that enable the CORBA interfaces for metamodels to be generated automatically, thus encouraging consistency in manipulating metadata in all phases of the distributed application development cycle. Mappings from MOF to W3C XML and XSD are specified in ISO/IEC 19503. Mappings from MOF to Java (TM) are in the JMI (Java Metadata Interchange) specification defined by the Java Community Process. ISO/IEC 19502:2005 specifies an abstract language for specifying, constructing, and managing technology neutral metamodels (a metamodel is in effect an abstract language for some kind of metadata); a framework for implementing repositories and integration frameworks (e.g., tool integration frameworks) that hold metadata (e.g., models) described by the metamodels and which uses standard technology mappings to transform MOF metamodels into metadata APIs. ISO/IEC 19502:2005 also provides a formal definition of the MOF meta-metamodel, i.e. the abstract language for specifying MOF metamodels; a mapping from arbitrary MOF metamodels to CORBA IDL that produces IDL interfaces for managing any kind of metadata; a set of 'reflective' CORBA IDL interfaces for managing metadata independent of the metamodel; a set of CORBA IDL interfaces for representing and managing MOF metamodels; an XMI format for MOF metamodel interchange (OMG XMI specification).

Technologies de l'information — Facilité d'objet "méta" (MOF)

General Information

• Status: Published
• Publication Date: 06-Nov-2005
• ICS: 35.040 - Information coding
• ICS: 35.040.50 - Automatic identification and data capture techniques
• Technical Committee: ISO/IEC JTC 1/SC 32 - Data management and interchange
• Drafting Committee: ISO/IEC JTC 1/SC 32 - Data management and interchange
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 03-Dec-2021

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 19502
First edition
2005-11-01

Information technology — Meta Object
Facility (MOF)
Technologies de l'information — Facilité d'objet «méta» (MOF)



Reference number
ISO/IEC 19502:2005(E)
©
ISO/IEC 2005

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ISO/IEC 19502:2005(E)
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©  ISO/IEC 2005
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ISO/IEC 19502:2005(E)

Contents
Foreword. viii
Introduction . ix
1 Scope .1
2 Normative references .1
2.1 Identical Recommendations | International Standards . 1
2.2 International Standards . 1
3 Abbreviations and Conventions .2
4 List of Documents .2
5 MOF Usage Scenarios .3
5.1 Overview . 3
5.2 Software Development Scenarios . 4
5.3 Type Management Scenarios . 5
5.4 Information Management Scenarios . 6
5.5 Data Warehouse Management Scenarios . 7
6 MOF Conceptual Overview .9
6.1 Overview . 9
6.2 Metadata Architectures . 9
6.2.1 Four Layer Metadata Architectures. 9
6.2.2 The MOF Μetadata Architecture . 10
6.2.3 MOF Metamodeling Terminology . 12
6.3 The MOF Model - Metamodeling Constructs . 13
6.3.1 Classes .13
6.3.2 Associations. 16
6.3.3 Aggregation . 17
6.3.4 References. 18
6.3.5 DataTypes . 20
6.3.6 Packages . 20
6.3.7 Constraints and Consistency . 23
6.3.8 Miscellaneous Metamodeling Constructs . 24
6.4 Metamodels and Mappings . 25
6.4.1 Abstract and Concrete Mappings . 25
6.4.2 Τhe MOF Metamodel το IDL Mapping . 26
6.4.3 Τhe MOF Metamodel το XML Mappingσ .26
6.4.4 Mappings of the MOF Model. 27
7 MOF Model and Interfaces .29
7.1 Overview . 29
7.2 How the MOF Model is Described . 29
7.2.1 Classes .30
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ISO/IEC 19502:2005(E)
7.2.2 Associations . 34
7.2.3 DataTypes . 35
7.2.4 Exceptions . 35
7.2.5 Constants. 36
7.2.6 Constraints . 36
7.2.7 UML Diagrams . 36
7.3 The Structure of the MOF Model . 36
7.3.1 The MOF Model Package . 36
7.3.2 The MOF Model Service IDL. 38
7.3.3 The MOF Model Structure . 38
7.3.4 The MOF Model Containment Hierarchy . 40
7.4 ΜOF Model Classes. 41
7.4.1 ModelElement . (abstract) 41
7.4.2 Namespace . (abstract) 45
7.4.3 GeneralizableElement. (abstract) 48
7.4.4 TypedElement . (abstract) 52
7.4.5 Classifier . (abstract) 53
7.4.6 Class . 54
7.4.7 DataType. (abstract) 55
7.4.8 PrimitiveType . 56
7.4.9 CollectionType . 57
7.4.10 EnumerationType. 58
7.4.11 AliasType . 59
7.4.12 StructureType. 59
7.4.13 StructureField. 60
7.4.14 Feature. (abstract) 60
7.4.15 StructuralFeature . (abstract) 62
7.4.16 Attribute. (idl_substitute_name “MofAttribute”) 63
7.4.17 Reference. 64
7.4.18 BehavioralFeature. (abstract) 66
7.4.19 Operation . 67
7.4.20 Exception .(idl_substitute_name “MofException”) 68
7.4.21 Association. 69
7.4.22 AssociationEnd . 71
7.4.23 Package . 74
7.4.24 Import . 76
7.4.25 Parameter . 78
7.4.26 Constraint . 79
7.4.27 Constant. 82
7.4.28 Tag . 83
7.5 MOF Model Associations . 85
7.5.1 Contains. 85
7.5.2 Generalizes . 86
7.5.3 RefersTo . 87
7.5.4 Exposes . (derived) 88
7.5.5 IsOfType .90
7.5.6 CanRaise . 90
7.5.7 Aliases. 91
7.5.8 Constrains. 92
7.5.9 DependsOn . (derived) 93
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7.5.10 AttachesTo . 95
7.6 MOF Model Data Types . 96
7.6.1 PrimitiveTypes used in the MOF Model . 96
7.6.2 MultiplicityType. 96
7.6.3 VisibilityKind. 97
7.6.4 DirectionKind. 98
7.6.5 ScopeKind . 98
7.6.6 AggregationKind . 98
7.6.7 EvaluationKind . 98
7.7 MOF Model Exceptions. 99
7.7.1 NameNotFound. 99
7.7.2 NameNotResolved. 99
7.8 MOF Model Constants . 99
7.8.1 Unbounded . 100
7.8.2 The Standard DependencyKinds . 100
7.9 MOF Model Constraints . 101
7.9.1 MOF Model Constraints and other M2 Level Semantics . 101
7.9.2 Notational Conventions . 101
7.9.3 OCL Usage in the MOF Model specification. 103
7.9.4 The MOF Model Constraints . 105
7.9.5 Semantic specifications for some Operations, derived Attributes
  and Derived Associations . 125
7.9.6 OCL Helper functions . 131
7.10 The PrimitiveTypes Package . 134
7.10.1 Boolean. 135
7.10.2 Integer . 135
7.10.3 Long . 135
7.10.4 Float . 135
7.10.5 Double . 135
7.10.6 String .135
7.10.7 IDL for the PrimitiveTypes Package . 136
7.11 Standard Technology Neutral Tags . 136
8 The MOF Abstract Mapping. 139
8.1 Overview . 139
8.2 MOF Values . 139
8.3 Semantics of Data Types . 139
8.4 Semantics of Equality for MOF Values . 140
8.5 Semantics of Class Instances . 141
8.6 Semantics of Attributes . 141
8.6.1 Attribute name and type. 142
8.6.2 Multiplicity .142
8.6.3 Scope . 143
8.6.4 Is_derived . 144
8.6.5 Aggregation. 144
8.6.6 Visibility and is_changeable. 144
8.7 Package Composition . 144
8.7.1 Package Nesting . 144
8.7.2 Package Generalization . 145
8.7.3 Package Importation . 145
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8.7.4 Package Clustering . 145
8.8 Extents . 145
8.8.1 The Purpose of Extents . 146
8.8.2 Class Extents . 147
8.8.3 Association Extents . 147
8.8.4 Package Extents . 147
8.9 Semantics of Associations . 149
8.9.1 MOF Associations in UML notation . 149
8.9.2 Core Association Semantics . 150
8.9.3 AssociationEnd Changeability . 152
8.9.4 Association Aggregation . 152
8.9.5 Derived Associations . 152
8.10 Aggregation Semantics . 152
8.10.1 Aggregation “none” . 152
8.10.2 Aggregation “composite” . 153
8.10.3 Aggregation “shared” . 153
8.11 Closure Rules . 153
8.11.1 The Reference Closure Rule. 153
8.11.2 The Composition Closure Rule . 155
8.12 Recommended Copy Semantics . 156
8.13 Computational Semantics . 157
8.13.1 A Style Guide for Metadata Computational Semantics . 157
8.13.2 Access operations should not change metadata . 158
8.13.3 Update operations should only change the nominated metadata . 158
8.13.4 Derived Elements should behave like non-derived Elements . 158
8.13.5 Constraint evaluation should not have side-effects . 158
8.13.6 Access operations should avoid raising Constraint exceptions . 159
9 MOF to IDL Mapping .161
9.1 Overview . 161
9.2 Meta Objects and Interfaces . 161
9.2.1 Meta Object Type Overview . 161
9.2.2 The Meta Object Interface Hierarchy . 163
9.3 Computational Semantics for the IDL Mapping . 165
9.3.1 The CORBAIdl Types Package. 165
9.3.2 Mapping of MOF Data Types to CORBA IDL Types. 169
9.3.3 Value Types and Equality in the IDL Mapping . 170
9.3.4 Lifecycle Semantics for the IDL Mapping . 170
9.3.5 Association Access and Update Semantics for the IDL Mapping . 173
9.3.6 Link Addition Operations . 173
9.3.7 Attribute Access and Update Semantics for the IDL Mapping . 176
9.3.8 Reference Semantics for the IDL Mapping . 181
9.3.9 Cluster Semantics for the IDL Mapping . 182
9.3.10 Atomicity Semantics for the IDL Mapping . 182
9.3.11 The Supertype Closure Rule . 182
9.3.12 Copy Semantics for the IDL Mapping . 183
9.4 Εxception Framework . 183
9.4.1 Error_kind string values . 185
9.4.2 Structural Errors . 185
9.4.3 Constraint Errors . 188
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9.4.4 Semantic Errors . 188
9.4.5 Usage Errors. 189
9.4.6 Reflective Errors . 190
9.5 Preconditions for IDL Generation . 192
9.6 Standard Tags for the IDL Mapping . 194
9.6.1 Tags for Specifying IDL #pragma directives . 194
9.6.2 Tags for Providing Substitute Identifiers . 195
9.6.3 Tags for Specifying IDL Inheritance . 196
9.7 Generated IDL Issues . 198
9.7.1 Generated IDL Identifiers . 198
9.7.2 Generation Rules for Synthesized Collection Types . 200
9.7.3 IDL Identifier Qualification . 202
9.7.4 File Organization and #include statements . 202
9.8 IDL Mapping Templates . 202
9.8.1 Template Notation. 203
9.8.2 Package Module Template . 203
9.8.3 Package Factory Template . 205
9.8.4 Package Template . 206
9.8.5 Class Forward Declaration Template . 209
9.8.6 Class Template . 209
9.8.7 Class Proxy Template . 210
9.8.8 Instance Template . 212
9.8.9 Class Create Template . 213
9.8.10 Association Template . 214
9.8.11 Attribute Template . 222
9.8.12 Reference Template . 231
9.8.13 Operation Template . 240
9.8.14 Exception Template . 242
9.8.15 DataType Template . 243
9.8.16 Constraint Template . 245
9.8.17 Annotation Template . 245
10 The Reflective Module .247
10.1 Introduction . 247
10.2 The Reflective Interfaces . 248
10.2.1 Reflective Argument Encoding Patterns . 248
10.2.2 Reflective::RefBaseObject . (abstract) 250
10.2.3 Reflective::RefObject . (abstract) 254
10.2.4 Reflective::RefAssociation . (abstract) 265
10.2.5 Reflective::RefPackage. (abstract) 269
10.3 The CORBA IDL for the Reflective Interfaces . 270
10.3.1 Introduction . 270
10.3.2 Data Types . 271
Annex A (normative) Conformance Issues .273
Annex B (normative) Legal Information.275
INDEX .279
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