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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.
The term DBCS traditionally refers to a character encoding where each graphic character is encoded in two bytes.. In an 8-bit code, such as Big-5 or Shift JIS, a character from the DBCS is represented with a lead (first) byte with the most significant bit set (i.e., being greater than seven bits), and paired up with a single-byte character-set (SBCS).
A code point is a value or position of a character in a coded character set. [10] A code space is the range of numerical values spanned by a coded character set. [10] [12] A code unit is the minimum bit combination that can represent a character in a character encoding (in computer science terms, it is the word size of the character encoding).
First Japanese electronic character set ECMA-48: 1972 7 bits Terminal text manipulation and colors ISO/IEC 8859: 1987 8 bits International codes ISO/IEC 10646 1991 21 bits usable, packed into 8/16/32-bit code units Unified encoding for most of the world's writing systems. As first introduced in 1991 had 16 bits; extension to 21 bits came later.
Less than 0.04% of all web pages use ISO-8859-2 as of October 2022. [3] [4] Microsoft has assigned code page 28592 a.k.a. Windows-28592 to ISO-8859-2 in Windows. IBM assigned code page 912 to ISO 8859-2, [5] until that code page was extended in 1999. [6] Code page 1111 is similar, but replaces byte B0 ° (degree sign) with U+02DA ˚ (ring above).
ASCII was incorporated into the Unicode (1991) character set as the first 128 symbols, so the 7-bit ASCII characters have the same numeric codes in both sets. This allows UTF-8 to be backward compatible with 7-bit ASCII, as a UTF-8 file containing only ASCII characters is identical to an ASCII file containing the same sequence of characters.
Download as PDF; Printable version; ... Six-bit character code; Slate and stylus; Stanford/ITS character set; String (computer science) T. T.50 (standard)
The category of character sets includes articles on specific character encodings (see the article for a precise definition). It includes those used in computer science (coded character sets (also known as character sets (this term should not be used anymore [according to whom?]) or code pages), character encoding forms, character encoding schemes) and those that use non-numeric, pre-digital ...