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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.
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 format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
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.
There is no Unicode code point for this symbol. Thus the replacement character is now only seen for encoding errors. Some software programs translate invalid UTF-8 bytes to matching characters in Windows-1252 (since that is the most common source of these errors), so that the replacement character is never seen.
After September 11, 2001, an email was circulated claiming that "Q33 NY", which it claims is the flight number of the first plane to hit the Twin Towers, in Wingdings would bring up a character sequence of a plane flying into two rectangular paper sheet icons which may be interpreted as skyscrapers, followed by the skull and crossbones symbol ...
The hardware code page of the original IBM PC supplied the following box-drawing characters, in what DOS now calls code page 437. This subset of the Unicode box-drawing characters is thus included in WGL4 and is far more popular and likely to be rendered correctly:
The Egyptian Hieroglyphs Unicode block has 94 standardized variants defined to specify rotated signs: [3] [4]. Variation selector-1 (VS1) (U+FE00) can be used to rotate 40 signs by 90°:
In Unicode, a Private Use Area (PUA) is a range of code points that, by definition, will not be assigned characters by the standard. [1] Three private use areas are defined: one in the Basic Multilingual Plane (U+E000–U+F8FF), and one each in, and nearly covering, planes 15 and 16 (U+F0000–U+FFFFD, U+100000–U+10FFFD).