<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article  PUBLIC '-//OASIS//DTD DocBook XML V4.4//EN'  'http://www.docbook.org/xml/4.4/docbookx.dtd'><article><articleinfo><title>WikiCourse/12 Headlines</title></articleinfo><section><title>Headlines</title><section><title>Input</title><screen><![CDATA[= First headline level with =-character =
== Second ==
=== Third ===
... (up to "Fifth")]]></screen></section><section><title>Display</title></section></section><section><title>First headline level with =-character</title><section><title>Second</title><section><title>Third</title><para>... (up to &quot;Fifth&quot;) </para><para><inlinemediaobject><imageobject><imagedata depth="16" fileref="http://clip.ipipan.waw.pl/wiki_static/mandarin_clip/img/idea.png" width="16"/></imageobject><textobject><phrase>(!)</phrase></textobject></inlinemediaobject> If a headline isn't displayed correctly, it is usually because: </para><itemizedlist><listitem><para>there are invisible (whitespace) spaces after the concluding =-character (they can be deleted manually or with &quot;Remove trailing whitespace from each line&quot; edit option). </para></listitem><listitem><para>the number of =-characters at the front and at the back doesn't match. </para></listitem></itemizedlist></section></section></section></article>