def init (self, base_ref, base_url, parent_url, recursion_level,
              aggregate, line, column, page, name, url_encoding, extern):
        """Initialize the scheme."""
        super(FileUrl, self).init(base_ref, base_url, parent_url,
         recursion_level, aggregate, line, column, page, name, url_encoding, extern)
        self.scheme = u'file'
Initialize the scheme.