The Cyrillic Supplement is a designated block of characters in the Unicode Standard. It occupies the code point range U+0500 through U+052F and contains additional Cyrillic letters and symbols not included in the primary Cyrillic block (U+0400–U+04FF). The block was introduced in Unicode version 3.0 (released in September 1999) to provide encoding support for historic and regional orthographies that employ extended Cyrillic characters.
Contents
The block consists of 48 assigned characters, including:
- Additional letters used in various minority languages of the former Soviet Union, such as Komi, Udmurt, Mari, Bashkir, and Tatar.
- Historical characters employed in older Slavic texts, including the dotted and hooked letters that appear in medieval manuscripts.
- Diacritic signs and punctuation marks specific to certain Cyrillic orthographies.
Languages and Usage
The characters encoded in the Cyrillic Supplement block support the written forms of several contemporary and historic languages, for example:
| Language | Representative characters |
|---|---|
| Komi | U+0500 (Ԁ), U+0501 (ԁ) |
| Udmurt | U+0524 (Ԥ), U+0525 (ԥ) |
| Mari | U+052E (Ԯ), U+052F (ԯ) |
| Old Church Slavonic (historical) | Various added letters for extinct phonemes |
These characters enable accurate digital representation of texts that otherwise could not be faithfully rendered using only the basic Cyrillic block.
Technical Details
- Block name: Cyrillic Supplement
- Range: 0500–052F (hexadecimal)
- Script: Cyrillic
- Introduced in: Unicode 3.0
The block follows the primary Cyrillic block and precedes the Cyrillic Extended‑A block (U+2DE0–U+2DFF) in the Unicode code space.
Standardization History
The need for a supplemental Cyrillic range emerged during Unicode’s early development as scholars and software developers reported that the existing Cyrillic block was insufficient for encoding all known Cyrillic letters. Unicode Technical Committee (UTC) discussions led to the allocation of the Supplement block, which was formally added in the 3.0 release. Subsequent Unicode versions have not altered the block’s contents, but have provided clearer normative references for its usage in language-specific orthographies.
References
- The Unicode Standard, Version 13.0, Chapter Unicode Character Database – Blocks, Cyrillic Supplement (U+0500–U+052F).
- Unicode Consortium, “Enumerated Versions of The Unicode Standard,” https://www.unicode.org/versions/.
- ISO/IEC 10646, International Standard—Universal Coded Character Set (UCS), Part 1: Architecture and Basic Multilingual Plane.
These sources constitute the primary encyclopedic documentation of the Cyrillic Supplement block.
