&lt;!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;para&gt;
The weekly incremental backup tape is labelled
&lt;medialabel&gt;Backup &lt;replaceable&gt;nn&lt;/replaceable&gt;&lt;/medialabel&gt;, where
&lt;replaceable&gt;nn&lt;/replaceable&gt; is the week number.
&lt;/para&gt;