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=head1 NAME
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XML::DOM::Entity - An XML ENTITY in XML::DOM
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=head1 DESCRIPTION
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XML::DOM::Entity extends L<XML::DOM::Node>.
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This node represents an Entity declaration, e.g.
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<!ENTITY % draft 'INCLUDE'>
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<!ENTITY hatch-pic SYSTEM "../grafix/OpenHatch.gif" NDATA gif>
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The first one is called a parameter entity and is referenced like this: %draft;
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The 2nd is a (regular) entity and is referenced like this: &hatch-pic;
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=head2 METHODS
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=over 4
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=item getNotationName
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Returns the name of the notation for the entity.
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I<Not Implemented> The DOM Spec says: For unparsed entities, the name of the
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notation for the entity. For parsed entities, this is null.
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(This implementation does not support unparsed entities.)
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=item getSysId
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Returns the system id, or undef.
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=item getPubId
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Returns the public id, or undef.
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=back
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=head2 Additional methods not in the DOM Spec
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=over 4
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=item isParameterEntity
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Whether it is a parameter entity (%ent;) or not (&ent;)
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=item getValue
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Returns the entity value.
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=item getNdata
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Returns the NDATA declaration (for general unparsed entities), or undef.
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=back
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