Hi Justin, We just recently added boosts for titles (and some other indexes) in the keyword index for two of our consortia, and I was inclined to ask the same question you just asked. However, we have since seen at least one negative side effect to adding this boost that is outlined at https://bugs.launchpad.net/evergreen/+bug/1019360. When excluding a search term, there are times when results with that particular term appear in your search results because that term is not included in the title index you added for weighting. As an example, if you create a title proper index with the keyword class, and then search twilight -meyer, the Stephanie Meyer novel will appear in your search results because "meyer" is not included in that title proper index.
I'm not sure we would want to add that functionality by default if it causes other problems with a search. Ideally, I would love it if there were a way to add weight for particular indexes while also being able to exclude terms when they appear anywhere in the record. Kathy ------------------------------------------------------------- Kathy Lussier Project Coordinator Massachusetts Library Network Cooperative (508) 343-0128 [email protected] IM: kmlussier (AOL & Yahoo) Twitter: http://www.twitter.com/kmlussier >>-----Original Message----- >>From: [email protected] [mailto:open-ils-dev- >>[email protected]] On Behalf Of Justin Hopkins >>Sent: Monday, July 23, 2012 2:37 PM >>To: Evergreen Development Discussion List >>Subject: [OPEN-ILS-DEV] Yet Another Relevancy Ranking Discussion >> >>After our migration this weekend and while I was poking around in the catalog >>looking for particular items I knew were there I realized that if you enter a >>title into the keyword search you're most likely gonna have a bad time. From >>the documentation it's clear to my why this is and how to fix it but I'm stuck >>wondering why Evergreen doesn't include some of the tweaks that as far as I >>can tell a lot of db admins are having to make. >> >>Is there a reason why titles aren't given a boost by default in the keyword >>index? My feeling - and those of pretty much everyone I've talked to is that >>patrons use keyword search to search for titles and that they'd be better >>served if the default ranking weights reflected this. >> >>Thoughts? >>justin
