I’ve been following (off and on) the discussions on #code4lib about mapping MARC to indices. I know each ILS has a different way of making this happen, but I wonder whether there has been any effort to pool together the decisions people have made (for instance, what MARC fields and subfields should be used for a title, or author, search?) It would be interesting to see how much uniformity (or not) is out there.

I’ve learned from #code4lib that Erik Hatcher is working on a Ruby library that will index MARC (so he has a start on a MARC mapping in a subversion repository). Are there other sources for seeing how people have mapped their MARC (or, even, how they’ve cleaned up their data — I know CDL has a date normalizing library). Is a site where this sort of information could be shared something that other people would find useful (and do our ILS contracts allow us to share it in some generic form)?