INCITS/ISO/IEC 10646:2020(2023)

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.