module module-a {

    namespace "urn:ietf:params:xml:ns:yang:module:a";

    prefix mod-a;

    container cont{
        container val {
            leaf-list create {
                type string;
            }
        }
    }

    augment "/cont" {
        container val {
            leaf arg {
                type string;
            }
        }
    }
}