a mechanism in XML and SGML for including arbitrary text and markup from another resource or file into the current document
An entity for use in document content. When used in documents, the name of a general entity must be preceded by an ampersand (&) and should be followed by a semicolon (;).
Used to reference text or previously defined markup instructions within the body of an SGML document. General entities are referenced using the `&' character.
An entity that is referenced as part of an XML document's content, as distinct from a parameter entity, which is referenced in the DTD. A general entity can be a parsed entity or an unparsed entity
An entity that can contain ordinary text, elements, and entity references. Often used to define commonly used strings.
An entity referenced by a name that starts with an ampersand (&) and ends with a semicolon. Most of the time general entities are used in SGML documents, not in the DTD. There are two types, external and internal entities, and they refer either to special characters or to text objects like commonly repeated phrases or names or chapters.
