Publican emits a WARNING for the <personname> tag. This tag is required by DocBook 5, however, because DB5 requires you to wrap the <firstname> and <surname> tags inside this element e.g:

DocBook 5:

<author>
    <personname>
        <firstname>JBoss Fuse</firstname>
        <surname>Doc Team</surname>
    </personname>
    ...
</author>


DocBook 4:

<author>
    <firstname>JBoss Fuse</firstname>
    <surname>Doc Team</surname>
    ...
</author