Inline Versus Out-of-Line Links
When a link does not contain any of the resources it's linking to, it's called an out-of-line link. Inline links are part of the resources they provide links for, but out-of-link links are not part of the same resource. There's a big movement to try to separate markup from content as much as possible (this is the motivation behind the big switch in HTML 4.0 to working with stylesheets instead of dedicated elements, such as <CENTER>, and the external code modules called behaviors in Internet Explorer). Using out-of-links is very attractive if that's the way you want to go.
You can place out-of-link links in their own documents, called linkbases. The actual set of out-of-line links in a linkbase is called a linkset. ...
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