'@return: The I{Content-Type} parameters, unquoted, as a flat list with
each Nth element giving a parameter name and N+1th element giving
the corresponding parameter value.'

def _unquotedAttrs(self):

    if self.attrs:
        unquoted = [(k, unquote(v)) for (k, v) in self.attrs.items()]
        return [y for x in sorted(unquoted) for y in x]
    return None
