In the example above we have only demonstrated simple link.
XLink is getting more interesting when we want to access remote
location as resources, instead of standalone pages. The
<description> element in the example above set the value of the
xlink:show attribute to "new". This means that the link should
open in a new window only. We could have sets the value of the
xlink:show attribute to "embed". This means that the resource
should be processed inline within the page itself. When you consider
that this could be another XML document and not just an image,
you could, for example, build a hierarchy of XML document.
With XLink, you can also specify WHEN the resources should
appear. This is can be done by the xlink:actuate attribute.
xlink:actuate="onLoad" specifies that the resource should be
loaded and shown when the document loads. However, xlink:actuate="onRequest"
means that the resource is not read or shown before the link is
clicked. This is very handy for low-bandwidth setting.