To use per-field similarity you have to add <similarity class="solr.SchemaSimilarityFactory"/> to your schema.xml file: And then in individual fields you can use the BM25 with different k1 and b.
-----Original Message----- From: David Cawley [mailto:david.cawl...@mail.dcu.ie] Sent: Thursday, April 14, 2016 11:42 AM To: solr-user@lucene.apache.org Subject: Solr Support for BM25F Hello, I am developing an enterprise search engine for a project and I was hoping to implement BM25F ranking algorithm to configure the tuning parameters on a per field basis. I understand BM25 similarity is now supported in Solr but I was hoping to be able to configure k1 and b for different fields such as title, description, anchor etc, as they are structured documents. I am fairly new to Solr so any help would be appreciated. If this is possible or any steps as to how I can go about implementing this it would be greatly appreciated. Regards, David Current Solr Version 5.4.1
