def __init__(self, domReader=None, base_url=None):
self.__base_url = base_url<EOL>self.__readerClass = domReader<EOL>if not self.__readerClass:<EOL><INDENT>self.__readerClass = DOMAdapter<EOL><DEDENT>self._includes = {}<EOL>self._imports = {}<EOL>
domReader -- class must implement DOMAdapterInterface
           base_url -- base url string