Unicode block: Difference between revisions

Revision as of 19:22, 25 August 2023

Revision as of 22:34, 12 September 2023

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== Design and implementation ==

Unicode blocks are identified by unique names, which use only ASCII characters and are usually descriptive of the nature of the symbols, in [[English language|English]]; such as "Tibetan" or "Supplemental Arrows-A". (When comparing block names, one is supposed to equate uppercase with lowercase letters, and ignore any whitespace, hyphens, and underbars; so the last name is equivalent to "supplemental_arrows__a" and "SUPPLEMENTALARROWSA".<ref name=uniblocks>{{Cite web|url=https://www.unicode.org/Public/UNIDATA/Blocks.txt|title=Unicode Blocks data file, Unicode version 1415.01|publisher=Unicode Consortium|access-date=20212023-09-1512}}</ref>

Blocks are [[intersection (set theory)|pairwise disjoint]]; that is, they do not overlap. The starting code point and the size (number of code points) of each block are always multiples of 16; therefore, in the [[hexadecimal notation]], the starting (smallest) point is U+''xxx''0 and the ending (largest) point is U+''yyy''F, where ''xxx'' and ''yyy'' are three or more hexadecimal digits. (These constraints are intended to simplify the display of glyphs in Unicode Consortium documents, as tables with 16 columns labeled with the last hexadecimal digit of the code point.<ref name=uniblocks/>) The size of a block may range from the minimum of 16 to a maximum of 65,536 code points.

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== List of blocks ==

Unicode {{Unicode version|version=15.01}} defines 327328 blocks:<ref name=uniblocks/>

* 164 in plane 0, the Basic Multilingual Plane (in table below: {{slink||BMP}})

* 151 in plane 1, the Supplementary Multilingual Plane ({{slink||SMP}})

* 67 in plane 2, the Supplementary Ideographic Plane ({{slink||SIP}})

* 2 in plane 3, the Tertiary Ideographic Plane ({{slink||TIP}})

* 2 in plane 14 (E in [[hexadecimal]]), the Supplementary Special-purpose Plane ({{slink||SSP}})