<xs:group name="genobj.class">
  <xs:choice>
    <xs:element ref="anchor">    </xs:element>
    <xs:element ref="bridgehead">    </xs:element>
    <xs:element ref="remark">    </xs:element>
  </xs:choice>
</xs:group>

<xs:group name="descobj.class">
  <xs:choice>
    <xs:element ref="abstract">    </xs:element>
    <xs:element ref="authorblurb">    </xs:element>
  </xs:choice>
</xs:group>

<xs:group name="docinfo.char.class">
  <xs:choice>
    <xs:element ref="author">    </xs:element>
    <xs:element ref="authorinitials">    </xs:element>
    <xs:element ref="corpauthor">    </xs:element>
    <xs:element ref="corpcredit">    </xs:element>
    <xs:element ref="modespec">    </xs:element>
    <xs:element ref="othercredit">    </xs:element>
    <xs:element ref="productname">    </xs:element>
    <xs:element ref="productnumber">    </xs:element>
    <xs:element ref="revhistory">    </xs:element>
  </xs:choice>
</xs:group>

<xs:group name="formalobject.title.content">
  <xs:sequence>
    <xs:element ref="title">    </xs:element>
    <xs:element minOccurs="0" ref="titleabbrev">    </xs:element>
  </xs:sequence>
</xs:group>