module mod2 {

    prefix abc;

    namespace "urn:cesnet:mod2";

    choice ch1 {

        default "login";

        case ca {

            list server {

                key "name";

                unique "ip port";

                leaf name {

                    type string;

                }

                leaf ip {

                    type string {

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

                    }

                }

                leaf port {

                    type uint16;

                }

            }

            description "test case";

        }

        container login {

            leaf login { type string; }

            leaf password {

                type string {

                    length "6..64";

                }

            }

            container ssh {

                uses g;

            }

        }

    }

    grouping g {

        leaf ssh_key {

            type string;

            mandatory true;

        }

    }

}