<book id="yaz">
<bookinfo>
<title>YAZ User's Guide and Reference</title>
<author><firstname>Sebastian</firstname><surname>Hammer</surname></author>
<author><firstname>Adam</firstname><surname>Dickmeiss</surname></author>
<book id="yaz">
<bookinfo>
<title>YAZ User's Guide and Reference</title>
<author><firstname>Sebastian</firstname><surname>Hammer</surname></author>
<author><firstname>Adam</firstname><surname>Dickmeiss</surname></author>