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A VARCHAR or variable character field is a set of character data of indeterminate length. The term varchar refers to a data type of a field (or column ) in a database which can hold letters and numbers.
&name; where name is the case-sensitive name of the entity. The semicolon is required. Because numbers are harder for humans to remember than names, character entity references are most often written by humans, while numeric character references are most often produced by computer programs. [1]
Legacy family field value range In hex Description 0 x x 0–127 (Only 0–13 are used) 0x00–0x7f The legacy Apollo NCS UUID 1 0 x 128–191 0x80–0xbf OSF DCE UUID 1 1 0 192–223 0xc0–0xdf Microsoft COM / DCOM UUID 1 1 1 224–255 0xe0–0xff Reserved for future definition
UTF-8 is a character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format – 8-bit. [1] Almost every webpage is stored in UTF-8. UTF-8 supports all 1,112,064 [2] valid code points using a variable-width encoding of one to four one-byte (8-bit) code units.
Unicode maintains a list of uniquely named character sequences for abstract characters that are not directly encoded in Unicode. [69] All assigned characters have a unique and immutable name by which they are identified. This immutability has been guaranteed since version 2.0 of The Unicode Standard by its Name Stability policy. [66]
UTF-16 (16-bit Unicode Transformation Format) is a character encoding that supports all 1,112,064 valid code points of Unicode. [1] [a] The encoding is variable-length as code points are encoded with one or two 16-bit code units.
The standard type hierarchy of Python 3. In computer science and computer programming, a data type (or simply type) is a collection or grouping of data values, usually specified by a set of possible values, a set of allowed operations on these values, and/or a representation of these values as machine types. [1]
This list provides an inventory of character coding standards mainly before modern standards like ISO/IEC 646 etc. Some of these standards have been deeply involved in historic events that still have consequences. One notable example of this is the ITA2 coding used during World War II (1939–1945).