Support for the 'in' operator
Abstract method to return the list of entities.
Abstract method to get the encoded form of an entity.
Gets the name associated with the passed unicode character.
Gets the unicode character associated with the passed name.
foreach iterator over the list of entities.
Checks whether the passed name is in the list of entities.
Checks whether the passed name is in the list of entities.
Checks whether the passed name is in the list of entities.
Checks whether the passed unicode is in the list of entities.
Checks whether the passed unicode is in the list of entities.
Checks whether the passed unicode is in the list of entities.
An entity. Simply a tuple of a name and a unicode value (eg "amp", '&').
Abstract entity set class.