Web Indexing
http://www.allegrotechindexing.com/news026.htm

Brown, Fred
Allegro Time!

Abstract:

Much like the well-known back-of-the-book index, web indexes help users find information using a variety of keywords and gathering similar information under a single topic. Instead of page numbers, web indexes are hypertext-linked directly to the content with in the web site itself. Web indexes work particularly well in sites that have a flat structure with only one or two levels of hierarchy.