module mod6 {

    prefix abc;

    namespace "urn:cesnet:mod6";

    import mod {

        prefix mod;

    }

    grouping gr {

        typedef my {

            type string {

                pattern '[a-zA-Z\-]+';

                pattern 'host-.*';

                length "8..255";

            }

            description "test";

        }

        leaf l1 { type my; }

        container presence {

            presence "enable";

            container ccc;

        }

    }

    feature f1;

    container ccc {

        uses gr {

            when '../leaf';

            if-feature f2;

            reference "test reference";

            status "current";

            description "test description";

            if-feature f1;

        }

    }

    list list {

        key keys;

        leaf keys { type string; }

        uses gr {

            description "test description";

            reference "test reference";

            refine l1 { description "test"; }

            if-feature f1;

            augment presence {

                container c {

                    description "container ccc";

                }

            }

            refine presence/ccc {

                reference "test reference";

                description "test description";

            }

            augment presence/ccc {

                leaf empty { type empty; }

            }

            if-feature f2;

        }

    }

    uses mod:gr;

    leaf leaf { type int16; }

    feature f2;

}