![]() The American Mathematical Society also contributed entities for mathematical characters. Standard public entity sets for characters ISO Entity Sets SGML supplied a comprehensive set of entity declarations for characters widely used in Western technical and reference publishing, for Latin, Greek and Cyrillic scripts. The semicolon is required, unless marked otherwise in the table below (see ). Where name is the case-sensitive name of the entity. The format is the same as for any entity reference: The entity must either be predefined (built into the markup language) or explicitly declared in a Document Type Definition (DTD). In contrast, a character entity reference refers to a character by the name of an entity which has the desired character as its replacement text. The hhhh may mix uppercase and lowercase, though uppercase is the usual style. The nnnn or hhhh may be any number of digits and may include leading zeros. The x must be lowercase in XML documents. Where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form. 5 Entities representing special characters in XHTMLĪ numeric character reference refers to a character by its Universal Character Set/ Unicode code point, and uses the format:.4 List of character entity references in HTML. ![]() 2 Standard public entity sets for characters. ![]()
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