The electronic version of this International Standard can be downloaded from the ISO/IEC Information Technology Task Force (ITTF) web site

Abstract Preview

This document

? specifies the architecture of the UCS;

? defines terms used for the UCS;

? describes the general structure of the UCS codespace;

? specifies the assigned planes of the UCS: the Basic Multilingual Plane (BMP) of the UCS, the Supplementary Multilingual Plane (SMP), the Supplementary Ideographic Plane (SIP), the Tertiary Ideographic Plane (TIP), and the Supplementary Special-purpose Plane (SSP);

? defines a set of graphic characters used in scripts and the written form of languages on a world-wide scale;

? specifies the names for the graphic characters and format characters of the BMP, SMP, SIP, TIP, SSP and their coded representations within the UCS codespace;

? specifies the coded representations for control characters and private use characters;

? specifies three encoding forms of the UCS: UTF-8, UTF-16, and UTF-32;

? specifies seven encoding schemes of the UCS: UTF-8, UTF-16, UTF-16BE, UTF-16LE, UTF-32, UTF-32BE, and UTF-32LE;

? specifies the management of future additions to this coded character set.

NOTE The determination of suitability of these characters for use as identifiers in programming languages is not specified by this document but can be found in an external reference. See Annex U.


General information

  • Status :  Published
    Publication date : 2020-12
  • Edition : 6
    Number of pages : 2804
  • :
    ISO/IEC JTC 1/SC 2
    Coded character sets
  • 35.040.10
    Coding of character sets

Buy this standard

Format Language
PDF
  • CHF198

Life cycle


Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information.