<?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 anchor element<anchor id="example.anchor.1"/> is empty and contributes nothing to the flow of the content in which it occurs. It is only useful as a target. </para>