ISO/IEC 15475-3:2002 情報技術— CDIF転送フォーマット—パート3：エンコーディングENCODING.1 | ページ 2

4.1 他の規格から

4.1.1 ISO/IEC 15474-1

ISO/IEC 15475 のこの部分では、ISO/IEC 15474-1 で定義されている次の用語を使用しています。

CDIF

標準の CDIF ファミリー

CDIF グラフィカル表記

CDIF セマンティック メタモデル

CDIFメタメタモデル

CDIF転送

CDIF転送フォーマット

キャラクターセット

エンコーディング

エンコード.1

メタ属性

メタ エンティティ

メタモデル

メタオブジェクト

メタ関係

モデル

非終端記号

生産ルール

主題分野

構文

SYNTAX.1

端末アイコン

移行

転送フォーマット

4.1.2 ISO/IEC 15475-1

ISO/IEC 15475 のこの部分では、ISO/IEC 15475-1 で定義されている次の用語を使用しています。

メタモデル セクション

転送ヘッダー

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, 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 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/IEC 15475-3 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 and 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.

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 together, these standards specify a mechanism for transferring information between tools.

ISO/IEC 15474-1:2002, Information technology — CDIF framework — 1: Overview and ISO/IEC 15474-2:2002, Information technology — CDIF framework — 2: Modelling and extensibility should be read first when initially exploring 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 standard defines an encoding of SYNTAX.1. ISO/IEC 15475-1:2002, Information technology — CDIF transfer format — 1: General rules for syntaxes and encodings describes how CDIF supports multiple syntaxes and encodings. ISO/IEC 15475-2:2002, Information technology — CDIF transfer format — 2: Syntax SYNTAX.1 defines the initial CDIF transfer format syntax, SYNTAX.1.

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 6: Concepts and facilitiesThis specifies the unique identifier for the encoding defined in this document and describes the concepts of clear text and character sets used in this document.
• Clause 7: Encoding structures and keywords in the CDIF transferThis Clause describes and gives examples of the format of transfer syntax terminals and lists the encodings of keywords.
• Annex A (normative): ENCODING.1 formal grammarThis annex defines the encoding rules for all non-terminals in the encoding.
• Annex B (informative): Multibyte examplesSupplementary Examples using multibyte codeset encoding are provided.

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 language that is defined for the transfer format also has applicability as a general language for Import/Export from repositories. 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 — 1: Overview. These standards cover the overall framework, the transfer format and the CDIF semantic metamodel.

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.

This document describes the standard CDIF Transfer Encoding for the standard CDIF Transfer Syntax as defined in ISO/IEC 15475-2:2002, Information technology -CDIF transfer format — 2: Syntax SYNTAX.1.

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.

The documents ISO/IEC 15474-1:2002, Information technology — CDIF framework — 1: Overview and ISO/IEC 15474-2:2002, Information technology — CDIF framework — 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.

This document should be read in conjunction with ISO/IEC 15475-1:2002, Information technology — CDIF transfer format — 1: General rules for syntaxes and encodings and ISO/IEC 15475-2:2002, Information technology — CDIF transfer format — 2: Syntax SYNTAX.1.

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;
• Formal grammars;
• Transfer formats.

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 amendments 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 undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.

4 Terms and definitions

For the purposes of this part of ISO/IEC 15475, the following definitions apply. Unless otherwise noted, the definitions are specific to this part of ISO/IEC 15475.

4.1.3 ISO/IEC 13238-1

This part of ISO/IEC 15474 makes use of the following terms from ISO/IEC 13238-1:

Transfer file

CDIF transfer file

Export process

Exporter

Import process

Importer

Clear text file encoding

4.2 For this standard

For the purposes of this part of ISO/IEC 15475 new terms are defined when introduced. Double quotes are used to introduce new terms (e.g., “model layer”).