Hi Hoss, I am not sure why you suggest Payload for ranking documents with more frequent tags above those with fewer tags. Wont the term frequency part of relevancy score ensure this by default? If you make tags a 'lowercase' field (with full value tokenisation), the frequency of tags in multivalued field should improve score for doc A in below scenario?
Payloads, I thought would be more useful when you want some tags in a record to be weighted more than others? Or have I missed some point maybe. Thanks, Rav On Tue, Apr 3, 2012 at 1:02 AM, Chris Hostetter <hossman_luc...@fucit.org>wrote: > > : Suppose I have content which has title and description. Users can tag > content > : and search content based on tag, title and description. Tag has more > : weightage. > : > : Any inputs on how indexing and retrieval will work given there is content > : and tags using Solr? Has anyone implemented search based on collaborative > : tagging? > > simple stuff would be to have your 3 fields, and search them with a > weighted boosting -- giving more importance to the tag field. > > where things get more complicated is when you want docA to score > higher for hte query "boat" then docB because 100 users have taged docA > with boat, but only 5 users have taged docB "boat" > > The canonical way to deal with this would be using payloads to boost the > weight of a term -- the DelimitedPayloadTokenFilterFactory can help with > this at index time, but off the top of my head i don't think any of the > existing Solr QParsers will build the neccessary PayloadTermQuery, so you > might have to roll your own -- there are afew Jira issues with patches > that you might be able to re-use or get inspired from... > > https://issues.apache.org/jira/browse/SOLR-1485 > > > > > -Hoss >
