Hi there, Is there a way to omit only term frequencies but keep positions? I see it's possible to omit frequencies and positions, or just positions for a field in a schema.xml ( https://solr.apache.org/guide/8_5/field-type-definitions-and-properties.html#field-default-properties), but we would like to omit term frequencies only. In a way, we assumed we could achieve this with:
omitTermFreqAndPositions="true" // forget term frequencies, forget positions omitPositions="false" // ... but actually, keep positions // ==> forget term frequencies only However, this looks just a bit weird ... and probably isn't how these options are intended to be combined? We also understand we can extend DefaultSimilarity (if it's still called that?) and return a constant, like, 1.0f for all term frequencies. However, from our recollection this requires creating a plugin and adding it to Solr's classpath -- which is possible, but is additional work which we'd rather not have to do if it is already an out of the box option. Context: our use case is coming from our scientific curators saying: - term frequencies are "overpowering" the contribution to the score of length normalisation. E.g., if Document1 has a multivalued field with the value, "Albumin", and someone searches this field for "Albumin", then they *really* want that document back first. Instead, Document2 whose field value is ["Albumin D box-binding protein", "Albumin D-element-binding protein", "2S albumin"] is coming higher. - they state that they're not actually interested in how many times a term appears, it's either there or not. Just to clarify from my above waffle, is it possible to omit term frequencies only, but keep positions? Many thanks, kind regards and have a nice day, Edd PS. I've seen this question asked a few times over the years, but wanted to ask again in case I've missed a new option in Solr. -------------------- Edward Turner
