+
+<section id="docbook-xml">
+<title><systemitem role="package">docbook-xml</systemitem></title>
+<para>
+<systemitem role="package">docbook-xml</systemitem> provides the
+DocBook XML DTDs, which are commonly used for Debian documentation (as
+is the older debiandoc SGML DTD). This manual, for instance, is
+written in DocBook XML.
+</para>
+<para>
+The <systemitem role="package">docbook-xsl</systemitem> package
+provides the XSL files for building and styling the source to various
+output formats. You will need an XSLT processor, such as <systemitem
+role="package">xsltproc</systemitem>, to use the XSL stylesheets.
+Documentation for the stylesheets can be found in the various
+<systemitem role="package">docbook-xsl-doc-*</systemitem> packages.
+</para>
+<para>
+To produce PDF from FO, you need an FO processor, such as <systemitem
+role="package">xmlroff</systemitem> or <systemitem
+role="package">fop</systemitem>. Another tool to generate PDF from
+DocBook XML is <systemitem role="package">dblatex</systemitem>.
+</para>
+</section>
+