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1、BRITISH STANDARD BS ISO/IEC 15475-1:2002 Information technology CDIF transfer format Part 1: General rules for syntaxes and encodings ICS 35.080 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 15475-1:2002 This British Standard
2、was published under the authority of the Standards Policy and Strategy Committee on 7 February 2003 BSI 7 February 2003 ISBN 0 580 37955 8 National foreword This British Standard reproduces verbatim ISO/IEC 15475-1:2002 and implements it as the UK national standard. The UK participation in its prepa
3、ration 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
4、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
5、 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 prop
6、osals 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 15 and a back cover. The BSI
7、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 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO/IEC 15475-1:2002(E) INTERNA
8、TIONAL STANDARD ISO/IEC 15475-1 First edition 2002-11-01 Information technology CDIF transfer format Part 1: General rules for syntaxes and encodings Technologies de linformation Format de transfert CDIF Partie 1: Rgles gnrales pour les syntaxes et les codages BS ISO/IEC 154751:2002 Licensed Copy: s
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14、witlrez dna ii ISO/IE 2002 C Allr ihgtsser edevr BS ISO/IEC 154751:2002 ii Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI-57451 CEI/1:2002(E) IS/OIE 2002 C All irthgs reservde iii Contents 1 Scope. 1 2 Conformance. 2 3 Normative referen
15、ces 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. 4 4.2 For this standard. 4 5 Symbols (and abbreviated terms). 4 5.1 Naming and diagramming notations 4 5.2 BNF conventions. 4 5.3 Abbreviations 5 6 CDIF transfer concepts and facilities . 5 6
16、.1 Separation of syntax and encoding 5 6.2 Independence of architecture components 5 6.3 Data types 5 6.4 Character sets . 5 7 General structure of a CDIF transfer. 6 7.1 Introduction. 6 7.2 Transfer header. 6 7.2.1 Introduction. 6 7.2.2 CDIF signature. 7 7.2.3 Syntax identifier. 7 7.2.4 Encoding id
17、entifier 8 7.2.5 Character set identifier 8 7.2.6 Transfer header example 8 7.3 Transfer contents 9 7.3.1 Introduction. 9 7.3.2 Header section. 9 7.3.3 Metamodel section 10 7.3.4 Model section 11 Annex A (normative) Transfer header formal grammar 12 Annex B (informative) SQL BNF conventions. 14 BS I
18、SO/IEC 154751:2002 iii Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/5475-:1(2002E) vi IS/OIE 2002 C All irthgs reservde Table of Illustrations Figure 1 Position in the CDIF family of standards 1 Figure 2 The general structure of
19、a CDIF transfer 6 Figure 3 The transfer header. 7 Figure 4 The transfer contents. 9 Figure 5 The transfer contents header section. 9 Figure 6 The transfer contents metamodel section 10 Figure 7 The transfer contents model section 11 BS ISO/IEC 154751:2002 iv Licensed Copy: sheffieldun sheffieldun, n
20、a, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI OSI-57451 CEI/1:2002(E) IS/OIE 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 standardiz
21、ation. 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 mutu
22、al 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 accordan
23、ce 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 Standa
24、rd 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 15475 may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO
25、/IEC 15475-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 7, Software and system engineering. ISO/IEC 15475 consists of the following parts, under the general title Information technology CDIF transfer format : Part 1: General rules for syntaxes an
26、d encodings Part 2: Syntax SYNTAX.1 Part 3: Encoding ENCODING.1 Annex A forms a normative part of this part of ISO/IEC 15475. Annex B is for information only. BS ISO/IEC 154751:2002 v Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/
27、5475-:1(2002E) iv IS/OIE 2002 C All irthgs reservde Introduction This standard will assist the vendors and users of modelling tools and metadata repositories in developing mechanisms for interchanging information. This standard specifies an element of a family of related standards. When used togethe
28、r, these standards specify a mechanism for transferring information between tools. ISO/IEC 15474-1:2002, Information technology CDIF framework Part 1: Overview and ISO/IEC 15474- 2:2002, Information technology CDIF framework Part 2: Modelling and extensibility should be read first when initially exp
29、loring CDIF. The first explains the overall CDIF Architecture and how the family of standards fits together. The second explains the scope, and modelling approach in CDIF. The CDIF Meta-metamodel and extensibility mechanisms are also defined in that document. This document, ISO/IEC 15475-1:2002, Inf
30、ormation technology CDIF transfer format Part 1: General rules for syntaxes and encodings, defines how CDIF supports multiple exchange syntaxes and encodings, and describes how CDIF metamodels are concretely represented during a transfer. ISO/IEC 15475-2:2002, Information technology CDIF transfer fo
31、rmat Part 2: Syntax SYNTAX.1 and ISO/IEC 15475-3:2002, Information technology CDIF transfer format Part 3: Encoding ENCODING.1. define one specific CDIF syntax and one specific CDIF encoding. This standard has been developed with the wide support and participation of vendors, users, academia and gov
32、ernment 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: Clauses 1 to 5 are prescribed ISO/IEC Clauses Clause 6: Concepts and facilities T
33、his describes the concepts of separation of syntax and encoding and independence of architecture components, and defines the general rules for data types and character sets in a transfer. Clause 7: General structure of the CDIF transfer This describes the purpose of a CDIF transfer, the syntax of th
34、e transfer header and the general syntax of a CDIF transfer. Annex A: Transfer header formal grammar This defines the precise format of the transfer header. Annex B: SQL BNF conventions These conventions are included for ease of reference. BS ISO/IEC 154751:2002 vi Licensed Copy: sheffieldun sheffie
35、ldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INETITANROS LANTDRADNA SIO/EIC 15475-:1(2002)E IS/OIE 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 model
36、ling 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 language that is defined for the Transfer Format also has applicability as a general language for Import/Export from repositories.
37、 The CDIF Semantic Metamodel defined for modelling tools also has applicability as the basis of standard definitions for use in repositories. The standards, which form the complete family of CDIF Standards, are documented in ISO/IEC 15474-1:2002, Information technology CDIF framework Part 1: Overvie
38、w. These standards cover the overall framework, the transfer format and the CDIF Semantic Metamodel. Figure 1 Position in the CDIF family of standards The diagram in Figure 1 depicts the various standards that comprise the CDIF family of standard. The shaded box depicts this Standard and its positio
39、n in the CDIF family of standard. Information technology CDIF transfer format Part 1: General rules for syntaxes and encodings BS ISO/IEC 154751:2002 1 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 03:55:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO1 CEI/5475-:1(2002E) 2 IS/OIE 2002 C A
40、ll irthgs reservde This document describes the way that CDIF metamodels are concretely represented during a transfer and the way that CDIF supports multiple exchange syntaxes and encodings. No specific exchange syntaxes or encodings are described in this document. ISO/IEC 15475-2:2002, Information t
41、echnology CDIF transfer format Part 2: Syntax SYNTAX.1 and ISO/IEC 15475-3:2002, Information technology CDIF transfer format Part 3: Encoding ENCODING.1. define one specific CDIF syntax and one specific CDIF encoding. This document is intended to be used by anyone wishing to understand and/or use CD
42、IF. This document provides an introduction to the entire CDIF family of standard. 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. The documents ISO/IEC 15474-1:2002, Information tech
43、nology CDIF framework Part 1: Overview and 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 standard. While there are no specific prer
44、equisites 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; Formal grammars; Transfer formats. 2 Conformance
45、 A product is standards conformant this standard if and only if the product obeys all definitions and rules in Annex A of this standard, and is also CDIF architecture conformant, as defined in Clause 2 of ISO/IEC 15474-1:2002, Information technology CDIF framework Part 1: Overview. A product can be
46、either transfer format standards conformant or non-conformant. Partial standards conformance to a standard defining a part of the CDIF transfer format is not defined. A product is standards conformant to a CDIF encoding standard only if it is standards conformant to Annex A of ISO/IEC 15475-3:2002,
47、Information technology CDIF transfer format Part 3: Encoding ENCODING.1 and also conformant to Annex A of ISO/IEC 15475-2:2002, Information technology CDIF transfer format Part 2: Syntax SYNTAX.1. A product is standard conformant to a CDIF syntax standard only if it is standards conformant to Annex
48、A of ISO/IEC 15475-2:2002, Information technology CDIF transfer format Part 2: Syntax SYNTAX.1. 3 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO/IEC 15475. For dated references, subsequent ame
49、ndments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO/IEC 15475 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For BS ISO/IEC 154751:2002 2 Licensed Copy: sheffieldun sheff