ISO/IEC TR 9789:1994 PDF

Name: ISO/IEC TR 9789:1994 — Information technology — Guidelines for the organization and representation of data elements for data interchange — Coding methods and principles
SKU: ISO/IEC TR 9789:1994
Price: 25 EUR
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Information technology — Guidelines for the organization and representation of data elements for data interchange — Coding methods and principles

Название (английский):

ISO/IEC TR 9789:1994

Information technology — Guidelines for the organization and representation of data elements for data interchange — Coding methods and principles

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 20
Дата публикации:: 22 декабря 1994 г.
Издание:: ISO/IEC TR 9789 edition 1 version 1
ICS:: 35.040

Тип поставки:

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Цена:300 €

Описание (английский):

Provides general guidance on the manner on which data can be expressed by codes. Describes the objectives of coding, the characteristics, advantages and disadvantages of different coding methods, the features of codes and gives guidelines for the design of codes. Examples of applications are ISO 9735:1988, ISO 8601:1988, ISO 3166:1993.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/IEC TR 9789:1994 - "Information technology - Guidelines for the organization and representation of data elements for data interchange - Coding methods and principles" is a Technical Report that provides general guidance on how data can be expressed by codes. It explains the objectives of coding, surveys coding methods and their advantages/disadvantages, lists desirable code features, and gives guidelines for the design and representation of code values. This report is application‑neutral (Type 3 Technical Report) and intended as a practical reference for information modelling and data interchange.

Key Topics

Definitions and principles: Core terms such as code, code element, coded set, coding scheme, identifier and delimiter; the role of coding in expressing information for processing and communication.

Coding objectives: Primary purposes - identification, classification, and acting as a key to further information - and how objectives drive code design.

Types of codes: Survey of coding methods including sequential, random, mnemonic, abbreviation‑based, matrix, hierarchical, juxtaposition, combination and value‑addition codes.

Features of good codes: Practical properties such as uniqueness, expandability, conciseness, simplicity, versatility, sortability, stability, significance, size, structure/format and capacity.

Representation of code values: Guidance on character sets and representation techniques for coded values to ensure interoperability in data interchange.

Design of codes: Practical design aspects - number of characters, coded format, character set choices, assignment conventions, and error detection (use of check characters).

Practical recommendations: General recommendations and example application areas without prescribing a single design method.

Applications and Who Uses It

ISO/IEC TR 9789 is useful for professionals designing or implementing structured data interchange and code lists:

Data architects and modellers defining data element types and identifiers

Systems integrators and EDI implementers building interoperable message formats

Database designers and software engineers choosing code formats and validation schemes

Standards developers, governmental agencies and statistical bodies preparing public code lists

Sectors using coded representations (finance, transport, health, trade) seeking principles for robust code design

The report supports sound decisions on code selection and creation to improve accuracy, processing efficiency and long‑term stability in data interchange.

ISO/IEC TR 9789:1994 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications and Who Uses It

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