BS ISO/IEC 10646:2020 Historical

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.

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