ISO/IEC 10646:2003

Information technology -- Universal Multiple-Octet Coded Character Set (UCS)

ISO/IEC 10646:2003 specifies the Universal Multiple-Octet Coded Character Set (UCS). It is applicable to the representation, transmission, interchange, processing, storage, input and presentation of the written form of the languages of the world as well as additional symbols.

ISO/IEC 10646:2003

  • specifies the architecture of ISO/IEC 10646:2003;
  • defines terms used in ISO/IEC 10646:2003;
  • describes the general structure of the coded character set;
  • specifies the Basic Multilingual Plane (BMP) of the UCS;
  • specifies supplementary planes of the UCS: the Supplementary Multilingual Plane (SMP), the Supplementary Ideographic Plane (SIP) 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 of the BMP, SMP, SIP, SSP and their coded representations;
  • specifies the four-octet (32-bit) canonical form of the UCS: UCS-4;
  • specifies a two-octet (16-bit) BMP form of the UCS: UCS-2;
  • specifies a multiple byte (one to four byte) transformation UTF-8 for use with ISO 646 (ASCII) byte-oriented environments;
  • specifies a two 16-bit form and associated transformation UTF-16 for supplementary characters;
  • specifies collection identifiers for selected set of character subsets;
  • specifies the coded representations for control functions;
  • specifies the management of future additions to this coded character set;
  • incorporates the Unicode bi-directional algorithm and normalization forms by reference.


General information

  • Current status : Withdrawn
    Publication date : 2003-12
  • Edition : 1
    Number of pages :
  • :
    ISO/IEC JTC 1/SC 2
    Coded character sets
  • 35.040.10
    Coding of character sets

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