Search results
Results From The WOW.Com Content Network
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.
The Unicode Consortium and the ISO/IEC JTC 1/SC 2/WG 2 jointly collaborate on the list of the characters in the Universal Coded Character Set.The Universal Coded Character Set, most commonly called the Universal Character Set (abbr. UCS, official designation: ISO/IEC 10646), is an international standard to map characters, discrete symbols used in natural language, mathematics, music, and other ...
Many Unicode characters are used to control the interpretation or display of text, but these characters themselves have no visual or spatial representation. For example, the null character (U+0000 NULL) is used in C-programming application environments to indicate the end of a string of characters.
Since the C99 standard, C supports escape sequences that denote Unicode code points, called universal character names. They have the form \uhhhh or \Uhhhhhhhh, where h stands for a hex digit. Unlike other escape sequences, a universal character name may expand into more than one code unit.
The replacement character (often displayed as a black rhombus with a white question mark) is a symbol found in the Unicode standard at code point U+FFFD in the Specials table. It is used to indicate problems when a system is unable to render a stream of data to correct symbols.
Support for Unicode literals such as char foo [512] = "φωωβαρ"; (UTF-8) or wchar_t foo [512] = L "φωωβαρ"; (UTF-16 or UTF-32, depends on wchar_t) is implementation defined, [6] and may require that the source code be in the same encoding, especially for char where compilers might just copy whatever is between the quotes.
Thus "H₂O" (using a subscript 2 character) is supposed to be identical to "H 2 O" (with subscript markup). In reality, many fonts that include these characters ignore the Unicode definition, and instead design the digits for mathematical numerator and denominator glyphs, [3] [4] which are aligned with the cap line and the baseline, respectively.
Use a special-character link to enter a Unicode character. Links are available under Special characters above the edit window, and below the buttons at the bottom of the edit window (for more information on the latter, see Help:CharInsert). Clicking a special-character link enters that character at the current position of the cursor in the edit ...