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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.
This is also the case for several other special punctuation characters. Copy editor Ashley Bischoff recently reminded everyone the en- and em-dashes are hiding under the standard hyphen key.. And ...
Many users have settings giving underlined links. When linking a special character, in some cases the result may be mistaken for another character with a different meaning: Linking + − < > ⊂ ⊃ gives + − < > ⊂ ⊃ which may look like ± = ≤ ≥ ⊆ ⊇. In such cases one can better use a separate link: A ⊂ B (see subset)
In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. These characters are characterized by being designed to be connected horizontally and/or vertically with adjacent characters, which requires proper alignment.
Unicode's U+FEFF ZERO WIDTH NO-BREAK SPACE character can be inserted at the beginning of a Unicode text to signal its endianness: a program reading such a text and encountering 0xFFFE would then know that it should switch the byte order for all the following characters. Its block name in Unicode 1.0 was Special. [5]
Box-drawing characters; Dingbat; Tombstone, the end of proof character; Other Unicode blocks Box Drawing; Block Elements; Geometric Shapes Extended; Halfwidth and Fullwidth Forms; Miscellaneous Symbols and Arrows (Unicode block) includes more geometric shapes; Miscellaneous Symbols and Pictographs (Unicode block) includes several geometric ...
The base form consists of a sequence of an opening round parenthesis, a character for the left eye, a character for the mouth or nose, a character for the right eye and a closing round parenthesis. The parentheses are often omitted for well-known kaomoji. The mouth/nose part may also be omitted if the eyes are much more important.