########## condition ##############

<condition>
<chap/<ch/<sec/<p/<anchor==<anchors
</condition>

########## andcondition ##############

<andcondition>
<book&&<chap/<ch/<sec/<p/<para==<paragraph
</andcondition>

########## orcondition ##############

<orcondition>
<book||<chap/<ch/<sec/<p/<ca==<caption
</orcondition>

########## noncondition ##############

<noncondition>
<para/<author==<auth
</noncondition>

########## andnoncondition ##############

<andnoncondition>
<book&&<chap//<anchor/<para/<it==<italics
</andnoncondition>

########## ornoncondition ##############

<ornoncondition>
<book||<chap//<anchor/<para/<b==<bold
</ornoncondition>

##</code><code>##

<chap>
  <ch>
    <sec>
      <p>
        <anchor><b>THE ILIAD</b></anchor>
        <para>
        <author>HOMER</author>
        </para>
        <ca>check</ca>
      </p>
    </sec>
    <sec>
      <author><it>HOMER</it></author>
      <p>
      <anchor>BOOK I</anchor>
        <para>
          Sing, O goddess, <it>the anger </it>of Achilles son of Peleus, that
          brought countless ills upon the Achaeans.
        </para>
       </p>
    </sec>
  </ch>
</chap>