<?xml version="1.0"?>
<!DOCTYPE example PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<example><title>The Grand Unified Theory</title><para><comment>Some details are still a bit shaky</comment>
…
Q.E.D.
</para></example>
