Attached is a minimal Docbook SGML file and a script which invokes the commands required to make a PDF using pdfjadetex.
Thanks for looking into this.
test.sh
Description: application/shellscript
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V4.2//EN">
<book>
<title>Some Title Here</title>
<titleabbrev>STH</titleabbrev>
<bookinfo>
<author>
<firstname>Neil</firstname>
<surname>Roeth</surname>
</author>
<copyright>
<year>2020</year>
<holder>Neil Roeth</holder>
</copyright>
</bookinfo>
<chapter>
<title>Introduction</title>
<para>This is a test. This is only a test. Now, back to our regularly scheduled program.</para>
</chapter>
</book>
