parameters: (self, name, type, externalID, systemID, content)
docstring: called when an ENTITY declaration has been found, name is the
             entity name and externalID, systemID are the entity public and
             system identifier for that entity if available, type indicates
             the entity type, and content reports it's string content
docstring_summary: called when an ENTITY declaration has been found, name is the
             entity name and externalID, systemID are the entity public and
             system identifier for that entity if available, type indicates
             the entity type, and content reports it's string content
docstring_tokens: called when an ENTITY declaration has been found name is the entity name and externalID systemID are the entity public and system identifier for that entity if available type indicates the entity type and content reports it s string content
function: def entityDecl(self, name, type, externalID, systemID, content):
          """called when an ENTITY declaration has been found, name is the
             entity name and externalID, systemID are the entity public and
             system identifier for that entity if available, type indicates
             the entity type, and content reports it's string content"""
          pass
function_tokens: def entityDecl ( self , name , type , externalID , systemID , content ) : pass