<?xml version="1.0" encoding="UTF-8"?>
<doctype>
  <modelGroup name="inline.class">
    <choice>
      <elementRef>
        <name>code</name>
      </elementRef>
      <elementRef>
        <name>em</name>
      </elementRef>
    </choice>
  </modelGroup>
  <modelGroup name="model">
    <zeroOrMore>
      <choice>
        <pcdata/>
        <modelGroupRef name="inline.class"/>
      </choice>
    </zeroOrMore>
  </modelGroup>
  <element>
    <name>para</name>
    <modelGroupRef name="model"/>
  </element>
  <element>
    <name>code</name>
    <modelGroupRef name="model"/>
  </element>
  <element>
    <name>em</name>
    <modelGroupRef name="model"/>
  </element>
</doctype>