module ext-typedef {
    yang-version 1;
    namespace "urn:simple.extension.typedefs";
    prefix "ext";

    organization "opendaylight";
    contact "http://www.opendaylight.org/";

    description "Model for testing and resolving of extension typedefs.";

    revision "2015-03-30" {
        reference "Initial revision.";
    }

    extension simple-ext-w-arg {
        argument "ext-arg";
        description "Extension with single argument definition.";
    }

    leaf myleaf {
        type union {
            type string;
            type int32;
        }
    }
}