BS-ISO-IEC-15474-1-2002.pdf

BRITISH STANDARD BS ISO/IEC 15474-1:2002 Information technology CDIF framework Part 1: Overview ICS 35.080 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 15474-1:2002 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Policy and Strategy Committee on 4 November 2002 © BSI 4 November 2002 ISBN 0 580 38415 2 National foreword This British Standard reproduces verbatim ISO/IEC 15474-1:2002 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/15, Software engineering, 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 section 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. Compliance 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 related 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 vi, pages 1 to 17 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO/IEC 15474-1:2002(E) INTERNATIONAL STANDARD ISO/IEC 15474-1 First edition 2002-10-15 Information technology CDIF framework Part 1: Overview Technologies de l'information Cadre de référence CDIF Partie 1: Vue d'ensemble BS ISO/IEC 154741:2002 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 154741:2002 ii Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI-47451 CEI/1:2002(E) © ISO/IE 2002 C All irthgs reservde iii Contents 1 Scope. 1 2 Conformance. 2 3 Normative reference . 2 4 Terms and definitions . 2 4.1 From ISO/IEC 13238-1 . 3 4.2 For this standard. 3 5 Symbols (and abbreviated terms). 7 5.1 Naming and diagramming notations 7 5.2 Abbreviations 8 6 CDIF concepts and facilities . 8 6.1 Introduction. 8 6.2 Fundamental goals 8 6.2.1 Extensibility. 8 6.2.2 Principle of maximum information transfer 9 6.3 Architecture of CDIF 9 6.3.1 Framework. 9 6.3.2 Information content. 11 6.3.3 Transfer format 12 6.4 CDIF family of standards. 13 6.4.1 Introduction. 13 6.4.2 Framework. 13 6.4.3 Information content. 13 6.4.4 Transfer format 13 7 CDIF family of standards. 14 7.1 Introduction. 14 7.2 Standards documents. 14 7.3 Frameworks. 15 7.3.1 Overview 15 7.3.2 Modelling and extensibility. 15 7.4 Semantic metamodel standards. 16 7.4.1 Foundation subject area . 16 7.4.2 Common subject area. 16 7.4.3 Data definitions subject area 16 7.4.4 Data models subject area 16 7.4.5 Data flow models subject area 16 7.4.6 State/event models subject area. 17 7.5 Transfer format 17 7.5.1 General rules for syntaxes and encodings 17 7.5.2 Syntax SYNTAX.1 17 7.5.3 Encoding ENCODING.1. 17 BS ISO/IEC 154741:2002 iii Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/5474-:1(2002E) vi © ISO/IE 2002 C All irthgs reservde Table of Illustrations Figure 1 CDIF family of standards 1 Figure 2 Use of the CDIF family of standards 8 Figure 3 Multiple layers 9 Figure 4 Architecture of CDIF 10 Figure 5 Architecture of the CDIF family of standards 14 BS ISO/IEC 154741:2002 iv Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI-47451 CEI/1:2002(E) © ISO/IE 2002 C All irthgs reservde v Foreword ISO (the International Organization for Standardization) 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 organization 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, 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 adopted 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 the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 15474-1 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 following parts, under the general title Information technology CDIF framework: Part 1: Overview Part 2: Modelling and extensibility BS ISO/IEC 154741:2002 v Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/5474-:1(2002E) iv © ISO/IE 2002 C All irthgs reservde Introduction This standard will assist the vendors and users of modelling tools and meta-data repositories in developing mechanisms for interchanging 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. This document, ISO/IEC 15474-1:2002, Information technology CDIF framework Part 1: Overview, describes the architecture of the CDIF family of standards and provides an overview to all the current standards that form the CDIF family of standards. The document ISO/IEC 15474-2:2002, Information technology CDIF framework Part 2: Modelling and extensibility, explains the scope, and modelling approach in CDIF. It also defines the CDIF meta-metamodel and extensibility mechanism of CDIF. This document and the Framework for Modelling and Extensibility should be read first when initially exploring CDIF. 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 general 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: CDIF Overview and architecture This Clause describes the scope, purpose, architecture, and fundamental concepts of CDIF. This Clause also describes the major components of the CDIF architecture: the framework, the transfer format, and the semantic metamodel. Clause 7: CDIF Family of standards overview This Clause describes the components of the CDIF semantic metamodel. These components are presented as a series of subject areas that serve to address key areas of the System's Development Life Cycle. BS ISO/IEC 154741:2002 vi Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO/IEC 15474-1:2002(E) © ISO/IE 2002 C All irthgs reservde 1 1 Scope The CDIF family of standards is primarily designed to be used as a description 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 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 repositories. The CDIF semantic metamodel also has applicability as the basis of standard definitions for use in repositories. 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. Figure 1 CDIF family of standards This document introduces the CDIF family of standards and defines the terms common to the CDIF family of standards. Information technology CDIF framework Part 1: Overview BS ISO/IEC 154741:2002 1 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/5474-:1(2002E) 2 © ISO/IE 2002 C All irthgs reservde 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: Those evaluating CDIF, Those who wish to understand the principles and concepts of a CDIF transfer, and Those developing importers and exporters. This document, ISO/IEC 15474-1:2002, Information technology - CDIF framework - Part 1: Overview, and the Framework document ISO/IEC 15474-2:2002, Information 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 reader 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 product's metamodel instances, and/or the product's metamodel using the concepts defined in the ISO/IEC 15474-2:2002, Information technology CDIF framework Part 2: Modelling and extensibility (“Framework document“), and all the concepts defined in the standard ISO/IEC 15476-1:2002, Information technology CDIF semantic metamodel Part 1: Foundation Subject Area (“Foundation document“), and obeys all the constraints and rules for metamodels and meta-data defined in the Framework document, and obeys all the rules and constraints defined in the Foundation document. Conformance to the graphical notation as defined in the Framework document is not required. 3 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this part of ISO/IEC 15474. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO/IEC 15474 are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO/IEC 13238-1: 1), Information technology Data management export/import Part 1: Standardization framework 4 Terms and definitions For the purposes of this part of ISO/IEC 15474 and of all the standards in the CDIF family of standards (ISO/IEC 15474, 15475, 15476) the following definitions apply: 1) To be published. BS ISO/IEC 154741:2002 2 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:54:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI-47451 CEI/1:2002(E) © ISO/IE 2002 C All irthgs reservde 3 4.1 From ISO/IEC 13238-1 This part of ISO/IEC 15474 and of all the standards in the CDIF family of standards (ISO/IEC 15474, 15475, 15476) make use of the following terms from ISO/IEC 13238-1 Data management Export/Import Standardization framework: Transfer file A file containing data to be interchanged. It is made up of a header, and a number of components. Components contain either data, or data definition data. CDIF transfer file A transfer file conforming to ISO/IEC 15475. Export process The process of generating a transfer file from a source environment. Exporter The agent of the export process. Import process The process of incorporating the content of a transfer file into a target environment. Importer The agent of the import process. Clear text file encoding A class of techniques for representing data based on first defining a human readable representation using some specific character repertoire and then defining an encoding for that repertoire. 4.2 For this standard For the purpose of this part of ISO/IEC 15474 and of all the standards in the CDIF family of standards (ISO/IEC 15474, 15475, 15476) the following definitions apply: Arity The arity (of a relationship) is the number of roles that participate in a relationship. A binary relationship has an arity of two. An n-ary relationship has an arity of n. (n2) sometimes known as the “degree“ of a relationship. Associative entity An entity used to represent a relationship between other entities. An associative entity is used when a relationship does not otherwise provide sufficient mechanisms. Attribute A single-valued characteristic of an entity or relationship. Attributed relationship A relationship that has attributes. Cardinality Describes the constraint on the number of entity instances that are related to the subject entity through a relationship. Cardinality is represented for each entity participating in a relationship by indicating the minimum and maximum number of its instances that may be associated with one particular instance of the related entity. CDIF See CDIF family of standards. CDIF clear text encoding A clear text file encoding of a CDIF transfer file. BS ISO/IEC 154741:2002 3 Licen