module mod2 {

    prefix abc;

    namespace "urn:cesnet:mod2";

    leaf kk {

        type string;

    }

    container ccc {

        list ll {

            key keys;

            leaf keys { type int16; }

            unique "config cont/state";

            leaf config { type boolean; }

            container cont {

                leaf state {

                    type string {

                        pattern '[a-z]+';

                    }

                    config false;

                }

            }

        }

    }

}