<xsd:attributeGroup name="level">
  <xsd:annotation>
    <xsd:documentation>
      <type>Attlist</type>
      <name>level</name>
      <comment>the attribute level specifies the level of the toc element.</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:attribute name="level" type="xsd:integer" use="required"/>
</xsd:attributeGroup> |