If you're using xlink:simple, then the xlink:role
and xlink:title attributes are simply role and
title. For example:
<xlink:simple
xmlns:xlink="http://www.w3.org/XML/XLink/0.9"
href="http://www.macfaq.com/personal.html"
title="Elliotte Rusty Harold's personal home page"
role="information about the author of this book">
<AUTHOR>Elliotte Rusty Harold</AUTHOR>
</xlink:simple>