In the markup languages SGML and HTML, a character entity reference is a reference to a particular kind of named entity that has been predefined or explicitly declared in a Document Type Definition (DTD). The "replacement text" of the entity consists of a single character from the Universal Character Set/Unicode.
The purpose of a character entity reference is to provide a way to refer to a universal character in a limited character encoding, like ASCII.
Although in popular usage character references are often called "entity references" or even "entities", this usage is wrong. A character reference is a reference to a character, not to an entity. Entity reference refers to the content of a named entity. An entity declaration is created by using the syntax in a document type definition (DTD) or XML schema. Then, the name defined in the entity declaration is subsequently used in the XML. When used in the XML, it is called an entity reference.
Famous quotes containing the words character, entity and/or reference:
“She [Evelina] is a little angel!... Her face and person answer my most refined ideas of complete beauty.... She has the same gentleness in her manners, the same natural graces in her motions, that I formerly so much admired in her mother. Her character seems truly ingenuous and simple; and at the same time that nature has blessed her with an excellent understanding and great quickness of parts, she has a certain air of inexperience and innocency that is extremely interesting.”
—Frances Burney (1752–1840)
“What is this world of ours? A complex entity subject to sudden changes which all indicate a tendency to destruction; a swift succession of beings which follow one another, assert themselves and disappear; a fleeting symmetry; a momentary order.”
—Denis Diderot (1713–1784)
“Meaning is what essence becomes when it is divorced from the object of reference and wedded to the word.”
—Willard Van Orman Quine (b. 1908)