The directory http://www.w3.org/XML/Test/XLink/ contains
a small collection XML documents which contain a modest inventory of good and not-so-good
uses of the XLink namespace:
The links below provide an XLink 1.1-conformant analysis of the relevant parts of these documents:
The above tabulations were produced using the script at http://www.w3.org/2006/08/showxlinks/showxlinks (member-only), which can be used to analyze other documents as well. Thanks to Norm Walsh for writing this.