1<grammar xmlns="http://relaxng.org/ns/structure/1.0">
2
3  <define name="inline">
4    <zeroOrMore>
5      <ref name="inline.class"/>
6    </zeroOrMore>
7  </define>
8
9  <define name="inline.class">
10    <choice>
11      <text/>
12      <element name="bold">
13	<ref name="inline"/>
14      </element>
15      <element name="italic">
16	<ref name="inline"/>
17      </element>
18    </choice>
19  </define>
20
21</grammar>
22