module mod1 {

    prefix abc;

    namespace "urn:cesnet:mod1";

    grouping gg {

        container ccc {

            presence "enable";

			uses hh;

            grouping hh {

                list ll {

                    key keys;

                    leaf keys {

                        type string;

                        mandatory true;

                    }

					uses repeat;

                    grouping repeat {

                        typedef abc {

                            type string {

                                pattern '[a-z]+';

                                length "1..255";

                            }

                        }

                        uses gg;  // circular dependency

                    }

                }

            }

        }

    }

}