value()
Instance Public methods
Returns the value of this entity. At the moment, only internal entities
are processed. If the value contains internal references (IE, %blah;),
those are replaced with their values. IE, if the doctype contains:
<!ENTITY % foo "bar">
<!ENTITY yada "nanoo %foo; nanoo>
then:
doctype.entity('yada').value #-> "nanoo bar nanoo"