def _querystring(self):
        """Additional keyword arguments"""
        kw = {}
        if self.status:
            kw["status"] = "all"

        if self.links:
            kw["links"] = "all"

        if self.include is not None:
            kw["include"] = self.include
        if self.subject_key_type != "SubjectName":
            kw["subjectKeyType"] = self.subject_key_type
        return kw