CDIF系列标准主要用于描述一种传输机制 建模工具之间的信息。当导入和 除了符合CDIF的协议之外，导出工具没有任何共同之处。定义的语言 传输格式还具有作为从存储库导入/导出的通用语言的适用性。CDIF 为CASE定义的语义元模型也具有作为标准定义基础的适用性，用于 存储库。 构成CDIF标准完整系列的标准记录在ISO/IEC 15474-1:20 02中， 信息技术-CDIF框架-第1部分:概述。这些标准涵盖了总体框架、 传输格式和CDIF语义元模型。图1？CDIF标准系列 图1中的图表描述了组成CDIF标准系列的各种标准。阴影框 描述该标准及其在CDIF标准系列中的地位。 该标准定义了CDIF语义元模型的公共主题领域。此主题区域包含 用作其他主题领域标准基础的元对象，以及元关系和元属性 适用于所有元对象。 本文档旨在供任何希望了解和/或使用CDIF的人使用。本文件提供 CDIF语义元模型的单个主题区域的定义。它适用于: ？那些评估CDIF的人， ？希望了解CDIF转让的原则和概念的人，以及 ？那些发展中的进出口商。本文件，ISO/IEC 15474-1:20 02，信息技术-CDIF框架-第1部分:概述，以及 框架文件ISO/IEC 15474-2:20 02，信息技术-CDIF框架-第2部分:建模和 扩展性，在最初探索CDIF时以及在尝试阅读中的其他文档之前，应首先阅读 CDIF标准系列。 虽然阅读本文档没有特定的先决条件，但读者熟悉本文档会有所帮助 具有以下内容: ？实体-关系-属性建模； ？建模（案例）工具； ？信息库； ？数据字典； ？多元层建模。

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 CASE 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: Overview. These standards cover 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. This standard defines the Common Subject Area of the CDIF semantic metamodel. This subject area contains meta-objects that are used as the basis of the other subject area standards, and also meta-relationships and metaattributes that are applicable to all meta-objects. This document is intended to be used by anyone wishing to understand and/or use CDIF. This document provides a definition of a single subject area of the CDIF semantic metamodel. 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.