1<grammar xmlns="http://relaxng.org/ns/structure/1.0"> 2 <start> 3 <element name="data"> 4 <interleave> 5 <text/> 6 <ref name="inline.class"/> 7 </interleave> 8 </element> 9 </start> 10 11 <define name="inline.class"> 12 <choice> 13 <element name="bold"> 14 <ref name="inline"/> 15 </element> 16 <element name="italic"> 17 <ref name="inline"/> 18 </element> 19 </choice> 20 </define> 21 22 <define name="inline"> 23 <zeroOrMore> 24 <choice> 25 <text/> 26 <element name="code"> 27 <ref name="inline"/> 28 </element> 29 <element name="em"> 30 <ref name="inline"/> 31 </element> 32 <!-- etc --> 33 </choice> 34 </zeroOrMore> 35 </define> 36</grammar> 37