module mod4 {

    prefix abc;

    namespace "urn:cesnet:mod4";

    leaf kk {

        type string;

    }

    container ccc {

        list ll {

            key keys;

            leaf keys { type int16; }

            unique "config cont/config dup_config";

            leaf config { type boolean; }

            container cont {

                leaf config {

                    type string {

                        pattern '[a-z]+';

                    }

                    config true;

                    default "ok";

                }

            }

            leaf dup_config {

                type string {

                    pattern '[a-z]+';

                }

                default "ok";

            }

        }

    }

    container presence {

        presence "enable";

        list ll {

            leaf keys { type int16; }

            key keys;

            unique "test";

            unique "cont/test";

            leaf test {

                type string;

                default "name";

            }

            container cont {

                leaf test {

                    type string;

                    default "name";

                }

            }

        }

    }

    list server {

        key "name";

        unique "ip port";

        leaf name {

            type string;

        }

        leaf ip {

            type string {

                pattern '[0-9\.]*';

            }

        }

        leaf port {

            type uint16;

        }

    }

}