&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;An example of a post office box address in the United States:
&lt;address&gt;
&lt;pob&gt;P.O. Box 1234&lt;/pob&gt;
&lt;city&gt;Anytown&lt;/city&gt;, &lt;state&gt;MA&lt;/state&gt; &lt;postcode&gt;12345&lt;/postcode&gt;
&lt;country&gt;USA&lt;/country&gt;
&lt;/address&gt;
&lt;/para&gt;
