<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>