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In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
Only a few higher-numbered codes can be created using entity names, but all can be created by decimal number character reference. Character entity references can also have the format &name; where name is a case-sensitive alphanumeric string. For example, "λ" can also be encoded as λ in an HTML document.
A numeric character reference ( NCR) is a common markup construct used in SGML and SGML-derived markup languages such as HTML and XML. It consists of a short sequence of characters that, in turn, represents a single character. Since WebSgml, XML and HTML 4, the code points of the Universal Character Set (UCS) of Unicode are used.
The format is the same as for any entity reference: &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]
A character reference takes the form &#N;, where N is either a decimal number for the Unicode code point, or a hexadecimal number, in which case it must be prefixed by x. The characters that compose the numeric character reference are universally representable in every encoding approved for use on the Internet. [citation needed]
Use an HTML character reference. The reference can be either named or numeric; either type begins with an ampersand (&) ends with a semicolon (;). A named reference is of the form &name;; for example, à refers to a lower-case Latin a with grave accent (à). Because the names are reasonably mnemonic, they are usually easier to remember ...
List of Pixar film references. Beginning with Red's Dream and its references to previous Pixar short films, Pixar has included references in its films to other works produced by the studio. [ 1] These have included cameo appearances, references to characters, objects, and titles of works. Additionally, such easter eggs or in-jokes can refer to ...
HTML 4.0 Character Entity References—shows how the named and decimal character references look in one's browser FileFormat.Info —details of many Unicode characters, including the named, decimal and hexadecimal character reference, showing how it should look and for each, how it looks in one's browser
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