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Block Elements is a Unicode block containing square block symbols of various fill and shading. Used along with block elements are box-drawing characters, shade characters, and terminal graphic characters. These can be used for filling regions of the screen and portraying drop shadows. Its block name in Unicode 1.0 was Blocks. [3]
A Unicode block is one of several contiguous ranges of numeric character codes (code points) of the Unicode character set that are defined by the Unicode Consortium for administrative and documentation purposes. Typically, proposals such as the addition of new glyphs are discussed and evaluated by considering the relevant block or blocks as a ...
The Unicode standard does not specify or create any font (), a collection of graphical shapes called glyphs, itself.Rather, it defines the abstract characters as a specific number (known as a code point) and also defines the required changes of shape depending on the context the glyph is used in (e.g., combining characters, precomposed characters and letter-diacritic combinations).
Unicode includes 128 such characters in the Box Drawing block. [1] In many Unicode fonts, only the subset that is also available in the IBM PC character set (see below) will exist, due to it being defined as part of the WGL4 character set.
Among the fonts in widespread use, [6] [7] full implementation is provided by Segoe UI Symbol and significant partial implementation of this range is provided by Arial Unicode MS and Lucida Sans Unicode, which include coverage for 83% (80 out of 96) and 82% (79 out of 96) of the symbols, respectively. [4]
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the ...
Numerous Unicode fonts support the Runic block, although most of them are strictly limited to displaying a single glyph per character, often closely modeled on the shape shown in the Unicode block chart. Free Unicode fonts that support the runic block include: Junicode, GNU FreeFont (in its monospace, bitmap face), Caslon, [citation needed] the ...
Some freely available fonts that include many Unicode blocks are TITUS Cyberbit Basic and GNU Unifont. The Unicode font article provides a more general overview through this table. If you already know what specific blocks are needed, this section may be more useful. Most articles on specific scripts include information on the corresponding ...