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https://issues.apache.org/jira/browse/SOLR-12238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17050462#comment-17050462
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Cassandra Targett commented on SOLR-12238:
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[~romseygeek] or [~alessandro.benedetti], This issue seems to be missing from
CHANGES.txt for 8.5 - was there a reason why it was left out, or is it just an
oversight?
> Synonym Query Style Boost By Payload
> ------------------------------------
>
> Key: SOLR-12238
> URL: https://issues.apache.org/jira/browse/SOLR-12238
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Affects Versions: 7.2
> Reporter: Alessandro Benedetti
> Assignee: Alan Woodward
> Priority: Major
> Fix For: 8.5
>
> Attachments: SOLR-12238.patch, SOLR-12238.patch, SOLR-12238.patch,
> SOLR-12238.patch
>
> Time Spent: 8h
> Remaining Estimate: 0h
>
> This improvement is built on top of the Synonym Query Style feature and
> brings the possibility of boosting synonym queries using the payload
> associated.
> It introduces two new modalities for the Synonym Query Style :
> PICK_BEST_BOOST_BY_PAYLOAD -> build a Disjunction query with the clauses
> boosted by payload
> AS_DISTINCT_TERMS_BOOST_BY_PAYLOAD -> build a Boolean query with the clauses
> boosted by payload
> This new synonym query styles will assume payloads are available so they must
> be used in conjunction with a token filter able to produce payloads.
> An synonym.txt example could be :
> # Synonyms used by Payload Boost
> tiger => tiger|1.0, Big_Cat|0.8, Shere_Khan|0.9
> leopard => leopard, Big_Cat|0.8, Bagheera|0.9
> lion => lion|1.0, panthera leo|0.99, Simba|0.8
> snow_leopard => panthera uncia|0.99, snow leopard|1.0
> A simple token filter to populate the payloads from such synonym.txt is :
> <filter class="solr.DelimitedPayloadTokenFilterFactory" encoder="float"
> delimiter="|"/>
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