<grammar xmlns="http://relaxng.org/ns/structure/1.0">

  <start>

    <ref name="anyElement"/>

  </start>

  <define name="anyElement">

    <element>

      <anyName/>

      <zeroOrMore>

	<choice>

	  <attribute>

	    <anyName/>

	  </attribute>

	  <text/>

	  <ref name="anyElement"/>

	</choice>

      </zeroOrMore>

    </element>

  </define>

</grammar>