Hello, I've added a feature to Ferret that breaks down the score of each matched document by the contribution from each of the document's fields. IndexSearcher now has a search_each_with_field_scores method, and TopDocs has an each_with_field_scores method. Both yield a third parameter, being a new score_by_field attribute of ScoreDoc. score_by_field is a hash with field_name keys and score values. I find this useful when I have indexed a document by using a separate field for each section of the document. The score breakdown can be used to provide a user with not only a link to each document in the search results, but to also a link to the most relevant section of those documents. Would this be something worthwhile to integrate into the Ferret distribution? None of the high-level APIs are broken, though scorers now return an array pair [score, score_by_field], rather than just the score.
on 2006-01-13 09:33