<element name="script" xmlns="http://relaxng.org/ns/structure/0.9">
  <zeroOrMore>
    <element name="function">
      <zeroOrMore>
	<element name="variable">
	  <attribute name="readonly">
	    <text/>
	  </attribute>
	  <text/>
	</element>
      </zeroOrMore>
    </element>
  </zeroOrMore>
</element>
