I came up with a Wiki Hack for a Blue Oxen thread about building a hierarchy of Cate Gory values in a WiKi. (Note that I don't think this is a great idea.) You start with the standard Cate Gory/Back Links feature of any Wiki Engine. Then:

• make a brittle hierarchy of category names: [Category Software], [Category Software Java], [Category Software Java Ejb], [Category Food Java], etc.

• in a given page reference all the category values you want

• modify the Backlinks/[Title Search] code to (if query startsWith Category?) do a query using startsWith instead of Equals (so if you do a Back Links from [Category Software] you get all pages containing [Category Software], [Category Software Java], etc.)

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