<?xml version="1.0"?> <!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <para> The Tiger<indexterm><primary>Big Cats</primary><secondary>Tigers</secondary></indexterm> is a very large cat indeed. </para>