A link element may contain optional xlink:role and xlink:title attributes that describe the remote resource, that is, the document or other resource to which the link points. For example:
<AUTHOR
xmlns:xlink="http://www.w3.org/XML/XLink/0.9"
xlink:href="http://www.macfaq.com/personal.html"
xlink:title="Elliotte Rusty Harold's personal home page"
xlink:role="information about the author of this book">
Elliotte Rusty Harold
</AUTHOR>
As with all other attributes, the xlink:title and xlink:role attributes should be declared in the DTD for all the elements to which they belong. For example, this is a reasonable declaration for the above AUTHOR element:
<!ELEMENT AUTHOR (#PCDATA)>
<!ATTLIST AUTHOR
xmlns:xlink CDATA #FIXED "http://www.w3.org/XML/XLink/0.9"
xlink:type CDATA #FIXED "simple"
xlink:href CDATA #REQUIRED
xlink:title CDATA #IMPLIED
xlink:role CDATA #IMPLIED
>