<grammar xmlns="http://relaxng.org/ns/structure/1.0">
<start>
<element name="p">
<ref name="inline"/>
</element>
</start>
<define name="inline">
<zeroOrMore>
<choice>
<text/>
<element name="bold">
<ref name="inline"/>
</element>
<element name="italic">
<ref name="inline"/>
</element>
<element name="span">
<optional>
<attribute name="style"/>
</optional>
<ref name="inline"/>
</element>
</choice>
</zeroOrMore>
</define>
</grammar>