> Discovery systems like VuFind and Blacklight (and probably most > others) also make heavy use of the subfields in the 6xxs for faceting. VuFind also uses subfields to help with relevance ranking -- for example, words within subfield a of a title are given more importance than words in the rest of the field -- extremely valuable if, for example, you're trying to find a book ABOUT an author rather than a book BY that author. - DemianReceived on Fri Jun 04 2010 - 08:28:28 EDT