1、BRITISH STANDARD BS ISO/IEC 15474-2:2002 Information technology CDIF framework Part 2: Modelling and extensibility ICS 35.080 BS ISO/IEC 15474-2:2002 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Policy and Strat
2、egy Committee on 8 November 2002 BSI 8 November 2002 ISBN 0 580 37949 3 National foreword This British Standard reproduces verbatim ISO/IEC 15474-2:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/15, Software engine
3、ering, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the sectio
4、n entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Com
5、pliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor relat
6、ed international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO/IEC title page, pages ii to vii, a blank page, pages 1 to 46, an inside back cover and a back cover. The BSI copyright date displayed in th
7、is document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO/IEC 15474-2:2002(E)INTERNATIONAL STANDARD ISO/IEC 15474-2 First edition 2002-10-15Information technology CDIF framework Part 2: Modelling and extensibility Technol
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11、m lertait gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. BSISO/IEC154742:2002ii Contents 1 Scope. 1 2 Conformance. 2 3 Normative references. 2 4 Terms and definitions 3 4.1 From other standards 3 4.1.1 ISO/IEC 15474-1. 3 4.1.2 ISO/IEC 13238-1. 3 4.2 For this stand
12、ard . 3 5 Symbols (and abbreviated terms). 4 5.1 Naming and diagramming conventions. 4 5.2 Abbreviations 4 6 CDIF meta-metamodel concepts and facilities. 4 6.1 Introduction. 4 6.2 Modelling approach. 4 6.2.1 Introduction. 4 6.2.2 Subject areas. 5 6.2.3 Many-to-many meta-relationships 5 6.2.4 Attribu
13、ted meta-relationships. 5 6.2.5 Subtyping of meta-entities 5 6.2.6 Multiple inheritance in meta-entities. 6 6.2.7 Subtyping of meta-relationships 7 6.2.8 Multiple inheritance of meta-relationships. 8 6.2.9 Arity of meta-relationships 8 6.2.10 Mutual exclusivity of meta-relationships 8 6.3 Subject ar
14、eas. 8 6.3.1 Explicit and implicit use of CollectableMetaObjects in subject areas 8 6.3.2 Rules for defining subject area. 9 6.3.3 Working metamodel 10 6.3.4 Subject area diagrams 10 6.4 Metamodel extensibility 10 6.4.1 Introduction. 10 6.4.2 Extensibility. 11 6.5 Exporter responsibilities. 12 6.5.1
15、 Introduction. 12 6.5.2 Extensibility. 12 6.5.3 Maximum output 12 6.5.4 Meta-attributes. 12 6.6 Importer responsibilities. 12 6.6.1 Introduction. 12 6.6.2 Information retention. 12 6.6.3 Working metamodel 12 6.6.4 Meta-attributes. 13 7 Modelling conventions 13 7.1 Naming of meta-objects 13 7.1.1 Nam
16、es 13 7.1.2 Uniqueness of names 13 7.2 Meta-object graphical notation . 13 7.2.1 Introduction. 13 7.2.2 Meta-entity symbol 14 BSISO/IEC154742:2002iii 7.2.3 Meta-relationship symbol 14 7.2.4 Meta-relationship cardinality symbol. 15 7.2.5 Meta-entity subtype hierarchy symbol . 16 7.2.6 Meta-relationsh
17、ip subtype hierarchy 16 7.2.7 Mutual exclusivity of meta-relationships . 17 7.2.8 Instance diagrams. 17 7.3 Meta-object definition format 19 7.3.1 Introduction. 19 7.3.2 Subject area definition 19 7.3.3 Meta-entity definition. 20 7.3.4 Meta-attribute definition 21 7.3.5 Meta-relationship definition
18、22 7.4 Meta-object reference format 23 7.5 Meta-object summary format 24 7.5.1 Introduction. 24 7.5.2 AttributableMetaObject classification hierarchy 24 7.5.3 MetaEntity and MetaRelationship summaries 24 8 Meta-metamodel overview 25 8.1 Introduction. 25 8.2 Meta-metamodel description 25 8.3 Meta-met
19、amodel diagram 26 9 Meta-metamodel summary 26 9.1 AttributableMetaObject classification hierarchy 26 9.1.1 Introduction. 26 9.1.2 Classification hierarchy 27 9.2 Meta-meta-entity summary. 27 9.3 Meta-meta-relationship summary. 29 10 Meta-metamodel specification 30 10.1 Data types specification 30 10
20、.1.1 Introduction. 30 10.1.2 Boolean 30 10.1.3 Date 30 10.1.4 Enumerated. 30 10.1.5 Float. 31 10.1.6 Identifier. 31 10.1.7 Integer 31 10.1.8 Point. 31 10.1.9 String. 31 10.1.10 Text 31 10.1.11 Time . 31 10.2 Meta-meta-entity and Meta-meta-attribute specifications . 32 10.2.1 AttributableMetaObject.
21、32 10.2.2 CollectableMetaObject 33 10.2.3 MetaAttribute. 33 10.2.4 MetaEntity 35 10.2.5 MetaObject. 36 10.2.6 MetaRelationship. 39 10.2.7 SubjectArea. 41 10.3 Meta-meta-relationship specifications. 42 10.3.1 AttributableMetaObject.HasSubtype.AttributableMetaObject.42 10.3.2 CollectableMetaObject.IsD
22、efinedIn.SubjectArea. 43 10.3.3 CollectableMetaObject.IsUsedIn.SubjectArea 44 10.3.4 MetaAttribute.IsLocalMetaAttributeOf.AttributableMetaObject.45 10.3.5 MetaRelationship.HasDestination.MetaEntity 45 10.3.6 MetaRelationship.HasSource.MetaEntity. 46 BSISO/IEC154742:2002iv Table of Illustrations Figu
23、re 1 CDIF family of standards 1 Figure 2 Multiple inheritance 6 Figure 3 Multiple inheritance: Invalid meta-attribute, Z1 7 Figure 4 Example of CDIF graphical notation 14 Figure 5 The meta-entity symbol 14 Figure 6 The meta-relationship symbol 15 Figure 7 A Reflexive meta-relationship 15 Figure 8 Th
24、e Meta-relationship cardinality symbol 15 Figure 9 The Meta-entity subtype hierarchy symbol 16 Figure 10 The Meta-entity subtype hierarchy symbol: Multiple inheritance 16 Figure 11 Mutual exclusivity of meta-relationships 17 Figure 12 Conceptual Diagram and an Instance Diagram 18 Figure 13 The CDIF
25、meta-metamodel 26 Table of Tables Table 1 Inheritance of meta-meta-attribute values by subtype meta-entities 6 Table 2 Inheritance of meta-meta-attribute values by subtype meta-relationships 8 Table 3 Contents of subject area definition 19 Table 4 Contents of meta-entity definition 20 Table 5 Conten
26、ts of meta-attribute definition 21 Table 6 Contents of meta-relationship definition 22 Table 7 Contents of meta-entity references 23 Table 8 Contents of meta-relationship references 23 Table 9 Data types supported by CDIF 30 BSISO/IEC154742:2002v Foreword ISO (the International Organization for Stan
27、dardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organiza
28、tion to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology,
29、 ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adop
30、ted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO/IEC 15474 may be t
31、he subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 15474-2 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 7, Software and system engineering. ISO/IEC 15474 consists of the fol
32、lowing parts, under the general title Information technology CDIF framework: Part 1: Overview Part 2: Modelling and extensibility BSISO/IEC154742:2002vi Introduction This standard will assist the vendors and users of modelling tools and meta-data repositories in developing mechanisms for interchangi
33、ng information. This standard specifies an element of a family of related standards. When used together, these standards specify a mechanism for transferring information between tools. ISO/IEC 15474-1:2002, Information technology CDIF framework Part 1: Overview should be read first when initially ex
34、ploring CDIF. It explains the overall CDIF Architecture and how the family of standards fits together. This standard, ISO/IEC 15474-2:2002, Information technology CDIF framework Part 2: Modelling and extensibility, should also be read before the other standards in the CDIF Family of Standards. It de
35、fines the CDIF meta-metamodel and the modelling concepts used throughout CDIF and the extensibility mechanism. This standard has been developed with the wide support and participation of vendors, users, academia and government involved in or familiar with the CASE industry, its products and the gene
36、ral requirements associated with interchanging information between these products. This document is organized into the following Clauses: Clause 1 to 5 are prescribed ISO/IEC Clauses Clause 6: Meta-metamodel concepts and facilities This defines the meta-metamodel, modelling rules and graphical conve
37、ntions that are used. The data types supported in metamodels are introduced. The concept of the working metamodel is also explained. It also describes the types of extensibility that may be used when extending the CDIF semantic metamodel. This Clause also describes the responsibilities of an exporte
38、r tool with regard to overlapping semantics and maximum output, and those of an importer tool with regard to the retention of information. Clause 7: CDIF modelling conventions This contains the diagramming and documentation conventions used in the CDIF semantic metamodels and in the meta-metamodel s
39、pecified in this document. Clause 8: Meta-metamodel overview This contains an overview of the CDIF meta-metamodel. This clause includes a meta-metamodel diagram. Clause 9: Meta-metamodel summary This contains an overview of the CDIF meta-metamodel. This clause includes an AttributableMetaObject hier
40、archy, a meta-meta-entity summary and a meta-meta-relationship summary Clause 10: Meta-metamodel specification This contains the full definitions of all the objects in the CDIF meta-metamodel. BSISO/IEC154742:2002vii 1 Scope The CDIF family of standards is primarily designed to be used as a descript
41、ion of a mechanism for transferring information between modelling tools. It facilitates a successful transfer when the authors of the importing and exporting tools have nothing in common except an agreement to conform to CDIF. The CDIF family of standards includes a semantic metamodel and a transfer
42、 format definition. It also includes the specification of a meta-metamodel and associated rules that define a framework for the semantic metamodel and the transfer format. The language that is defined for the transfer format also has applicability as a general language for Import/Export for reposito
43、ries. The CDIF semantic metamodel also has applicability as the basis of standard definitions for use in repositories. The standards that form the complete family of CDIF Standards are documented in ISO/IEC 15474-1:2002, Information technology - CDIF framework - Part 1: Overview. These standards cov
44、er the overall framework, the transfer format and the CDIF semantic metamodel. Figure 1 CDIF family of standards The diagram in Figure 1 depicts the various standards that comprise the CDIF family of standards. The shaded box depicts this Standard and its position in the CDIF family of standards. In
45、formation technology CDIF framework Part 2: Modelling and extensibility BSISO/IEC154742:20021 This document (ISO/IEC 15474-2:2002, Information technology - CDIF framework - Part 2: Modelling and extensibility) includes the definition of the CDIF meta-metamodel and describes the rules and notations u
46、sed throughout the CDIF family of standards. The rules for extending the CDIF semantic metamodel are also defined. This document is intended to be used by anyone wishing to understand and/or use CDIF. This document provides an introduction to the entire CDIF family of standards. It is suitable for:
47、Those evaluating CDIF, Those who wish to understand the principles and concepts of a CDIF transfer, and Those developing importers and exporters. The document, ISO/IEC 15474-1:2002, Information technology - CDIF framework - Part 1: Overview, and this framework document ISO/IEC 15474-2:2002, Informat
48、ion technology - CDIF framework - Part 2: Modelling and extensibility, should be read first when initially exploring CDIF and before attempting to read other documents in the CDIF family of standards. While there are no specific prerequisites for reading this document, it will be helpful for the rea
49、der to have familiarity with the following: Entity-Relationship-Attribute modelling; Modelling (CASE) tools; Information repositories; Data dictionaries; Multiple meta-layer modelling. 2 Conformance A product is CDIF architecture conformant if and only if it can, as a property of that product, represent the products metamodel instances, and/or the products metamodel using the concept
