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An entity is a named sequence
of characters, predefined in a DTD for convenience.
Typical uses
include:
- to represent characters which cannot reliably be typed
in
- as a short cut for boiler plate text
- containers for
external (non-XML) data such as graphics
- as a means of abbreviating
parts of a DTD (parameter entities)
The Unicode standard
includes entity names and encodings for most of the world's writing
systems
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