ISO 17972-1:2015 グラフィックテクノロジー—カラーデータ交換フォーマット—パート1：CxF3（CxF / X）との関係 | ページ 2

3.1 規約

注記 Color Exchange Format v3.0 から取られた用語の綴りは、規範的参照で使用されているものから変更されていません。具体的な例は、color ではなく color という単語です。

Foreword

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The committee responsible for this document is ISO/TC 130, Graphic technology.

ISO 17972 consists of the following parts, under the general title Graphic technology — Colour data exchange format (CxF/X):

• Part 1: Relationship to CxF3(CxF/X)
• Part 4: Spot color characterisation data (CxF/X-4)

The following parts are under development:

• Part 2: Scanner target data (CxF/X-2)
• Part 3: Printer target data (CxF/X-3)

Introduction

ISO 17972 (all parts) defines methods for the use of CxF3 to exchange measurement data and associated metadata within the graphic arts industry and for the exchange of these files between graphic arts users. It is a multi-part document where each part is intended to respond to different workflow requirements. The goal throughout the various parts of ISO 17972 has been to maintain the degree of flexibility required while minimizing the uncertainty of the data exchanged.

A number of International Standards used by the graphic technology community require the reporting of measured and/or computed data. Several of these standards, e.g. ISO 12642 and ISO 13655, have used the ASCII keyword-value pair approach and have been widely used by some industry segments. However, there has been a large degree of variability in implementation, which has not facilitated good automated data exchange creating uncertainty. ISO 28178 attempted to rectify this situation by creating a bridge between the ASCII Keywords approach and an XML flat file approach, but the flat file approach had limitations and has not been widely used. This part of ISO 17972 advances this process further by identifying the use of the publicly available Color Exchange Format version 3 (CxF3) for prepress data exchange and verification. In order to achieve a level of exchange that avoids any ambiguity in interpretation of the file. Each part defines a required and optional set of CxF elements that are permitted to be used. This first document will outline the mapping of CxF to the existing elements in ISO 28178 (provided in Annex A) and illustrate the underlying concepts of CxF.

NOTEX-Rite Inc., the original creator of the CxF file format, claims no intellectual property rights to the materials used in this part of ISO 17972.

This part of ISO 17972 is intended to support all existing and future graphic arts standards that require the exchange of measured, computed, or process control data and the associated metadata necessary for its proper interpretation.

In reviewing the needs of such a format, the following requirements were identified:

• existing applications using ISO 28178 formatted documents in ASCII format should not be rendered obsolete by the new standard;
• data needs to be in a form that is both human-readable (once the digital file has been displayed using standard editors or file readers) and machine-readable;
• data needs to be readable by automated programs to extract the necessary information;
• data files need to be extensible by end users in such a way as to allow additional information to be included without breaking automated readers of the file;
• data files need to be capable of being created by automated programs;
• the format needs to allow multiple language representation of data.

The following files are part of ISO 17972-1, and are included as electronic inserts:

• CxF3_Core.xsd;
• CxF3_Schema_Diagram.pdf;
• Scannertarget.cxf;
• Scannertarget.txt;
• Holidays_test.cxf.

1 Scope

This part of ISO 17972 defines an exchange format for colour and process control data (and the associated metadata necessary for its proper interpretation) in electronic form. It is the base document for describing the use of CxF3 for data exchange. Where required, this part of ISO 17972 also defines additional requirements for a valid CxF/X file. Using XML, all CxF3 and CxF/X documents also support the exchange of data outside of the graphic arts workflow and can support future standards with an extensible architecture using standard XML Names and Metadata tags which can be used with standard XML tools and pass XML validation.

Additional parts of ISO 17972 will use custom resources in conjunction with CxF3 to define the required and optional data for a particular workflow.

2 Normative references

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.2 Definitions

Bibliography