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== Unicode blocks ==
A Unicode block, or, simply, a block, is any one of the subsets of the Unicode code space that are listed in the file [ftp://www.unicode.org/Public/UNIDATA/Blocks.txt Blocks.txt] of the Unicode Character Database. The file [ftp://www.unicode.org/Public/UNIDATA/Blocks.txt Blocks.txt] in the Unicode Character Database lists several subsets of the Unicode code space, each of which is called a Unicode block, or, simply, a block. The Unicode code space is the set of all code points, that is, the set of all integers from 0 to the integer whose hexadecimal representation is 10FFF.
Every block is an interval of code points. Different blocks are disjoint from each other, and every code point belongs to at least one block. Thus, the blocks form a partition of the set of all Unicode code points. The number of code points in a block varies. Some have just 16 code points, and some others have thousands of code points.
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