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From Doug Turnbull <>
Subject Re: Solr Support for BM25F
Date Thu, 14 Apr 2016 16:48:02 GMT
Hey David

You can configure BM25 differently for each field by configuring the
similarity per field type, as shown here in this example from the Solr tests

On Thu, Apr 14, 2016 at 12:41 PM, David Cawley <>

> 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

*Doug Turnbull **| *Search Relevance Consultant | OpenSource Connections
<>, LLC | 240.476.9983
Author: Relevant Search <>
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