Excuse the rather shameless plug, but for those of you interested in learning more about XLink and XPointer, including the benefits that it can bring and how it can practically be used within the current Web environment (including dealing with the lack of effective XLink implementations) you might like to look at our soon to be released book (currently with the publishers): Wilde, Erik; Lowe, David (2002), "XPath, XLink, XPointer and XML: A Practical Guide to Web Hyperlinking and Transclusion", Addison-Wesley Longman.
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