<para>
The quick brown fox.
<indexterm><primary>Aardvark</primary></indexterm>
<indexterm><primary>Boar</primary></indexterm>
<indexterm><primary>Coypu</primary></indexterm>
</para>
<index><title>First Index</title></index>

<?sdop index_headings="no"?>

<para>
The quick brown fox.
<indexterm role="two"><primary>Aardvark</primary></indexterm>
<indexterm role="two"><primary>Boar</primary></indexterm>
<indexterm role="two"><primary>Coypu</primary></indexterm>
</para>
<index role="two"><title>Second Index</title></index>

<?sdop index_headings="yes"?>

<para>
The quick brown fox.
<indexterm role="three"><primary>Aardvark</primary></indexterm>
<indexterm role="three"><primary>Boar</primary></indexterm>
<indexterm role="three"><primary>Coypu</primary></indexterm>
</para>
<index role="three"><title>Third Index</title></index>
