Unicode block
Encyclopedia
In Unicode
, a block is defined as one contiguous range of code point
s. Blocks are named uniquely and have no overlap
. They may be defined with the starting and ending code points. The block explicitly can include code points that are unassigned and non-characters. Code points not belonging to any of the named blocks, e.g. in the unassigned planes 3–13, have the value block="No_block".
Conversely, every assigned code point has a property "Block name", which names in which block the character is. This is determined by the code point only, although a block name will have a descriptive nature: "Tibetan" or "Supplemental Arrows-A". All assigned code points have a single block name.
Subdivisions, such as "Chess symbols
" in the block Miscellaneous symbols, are not a "block". The subgroup name is an informative editorial addition only.
Unicode
Unicode is a computing industry standard for the consistent encoding, representation and handling of text expressed in most of the world's writing systems...
, a block is defined as one contiguous range of code point
Code point
In character encoding terminology, a code point or code position is any of the numerical values that make up the code space . For example, ASCII comprises 128 code points in the range 0hex to 7Fhex, Extended ASCII comprises 256 code points in the range 0hex to FFhex, and Unicode comprises 1,114,112...
s. Blocks are named uniquely and have no overlap
Intersection (set theory)
In mathematics, the intersection of two sets A and B is the set that contains all elements of A that also belong to B , but no other elements....
. They may be defined with the starting and ending code points. The block explicitly can include code points that are unassigned and non-characters. Code points not belonging to any of the named blocks, e.g. in the unassigned planes 3–13, have the value block="No_block".
Conversely, every assigned code point has a property "Block name", which names in which block the character is. This is determined by the code point only, although a block name will have a descriptive nature: "Tibetan" or "Supplemental Arrows-A". All assigned code points have a single block name.
Subdivisions, such as "Chess symbols
Chess symbols in Unicode
Chess symbols are part of Unicode.Instead of using images, one can represent chess pieces by symbols that are defined in the Unicode character set. This makes it possible to:...
" in the block Miscellaneous symbols, are not a "block". The subgroup name is an informative editorial addition only.