def r_dts_collection(self, objectId=None):
        """ DTS Collection Metadata reply for given objectId

        :param objectId: Collection Identifier
        :return: JSON Format of DTS Collection
        """
        try:
            j = self.resolver.getMetadata(objectId=objectId).export(Mimetypes.JSON.DTS.Std)
            j = jsonify(j)
            j.status_code = 200
        except NautilusError as E:
            return self.dts_error(error_name=E.__class__.__name__, message=E.__doc__)
        return j
DTS Collection Metadata reply for given objectId

        :param objectId: Collection Identifier
        :return: JSON Format of DTS Collection