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https://issues.apache.org/jira/browse/SOLR-7539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15011006#comment-15011006
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Ted Sullivan commented on SOLR-7539:
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I have just uploaded a new patch that adds what I call "verb support" to the
autofilter. This enables you to specify terms that will constrain the
autofilter field choices. The example I have been using for this is a Music
Ontology that I have been using to demonstrate the features of the query
autofilter. So if I have records of musicians, songwriters, songs etc. with
fields like performer_ss, composer_ss, composition_type_s and so on. If I
search for
songs written by Johnny Cash
vs
songs performed by Johnny Cash
Without the verb support, the autofilter would pick up composition_type_s:Song
and performer_ss:"Johnny Cash" OR composer_ss:"Johnny Cash" because this artist
has documents in which he is either (or both) a performer and a songwriter.
That is, both of these queries would return the same results because neither
'written' or 'performed' is a value in any document field.
By adding configurations like this and some supporting code
<searchComponent name="autofilter"
class="org.apache.solr.handler.component.QueryAutoFilteringComponent" >
<arr name="verbModifiers">
<str>written,wrote,composed:composer_ss</str>
<str>performed,played,sang,recorded:performer_ss</str>
</arr>
</searchComponent>
The above queries work as expected. The code detects the presence of the
modifier in proximity to a term that occurs in the search field (for 'written'
that would be 'composer_ss') and then collapses the choices to that field alone
so
(composer_ss:"Johnny Cash" OR performer_ss:"Johnny Cash") becomes just
composer_ss:"Johnny Cash" when the verb is 'written' and performer_ss:"Johnny
Cash" when the verb is 'performed'.
In addition, noun phrases that are composed of two different nouns in which one
acts as a qualifier of the other as in "Beatles Songs" are handled with this
configuration:
<str>covered,covers:performer_ss|version_s:Cover|original_performer_s:_ENTITY_,recording_type_ss:Song=>original_performer_s:_ENTITY_</str>
In this case, "Beatles Songs" is a single noun phrase that refers to songs
written by one or more of the Beatles. With this configuration and supporting
code, we can now disambiguate queries like:
"Beatles Songs covered" - which are covers of Beatles songs by other artists
from "songs Beatles covered" - which are songs performed by the Beatles that
were written by other songwriters. Two test cases have been added to the patch
to demonstrate these new features.
> Add a QueryAutofilteringComponent for query introspection using indexed
> metadata
> --------------------------------------------------------------------------------
>
> Key: SOLR-7539
> URL: https://issues.apache.org/jira/browse/SOLR-7539
> Project: Solr
> Issue Type: New Feature
> Reporter: Ted Sullivan
> Priority: Minor
> Fix For: Trunk
>
> Attachments: SOLR-7539.patch, SOLR-7539.patch, SOLR-7539.patch,
> SOLR-7539.patch
>
>
> The Query Autofiltering Component provides a method of inferring user intent
> by matching noun phrases that are typically used for faceted-navigation into
> Solr filter or boost queries (depending on configuration settings) so that
> more precise user queries can be met with more precise results.
> The algorithm uses a "longest contiguous phrase match" strategy which allows
> it to disambiguate queries where single terms are ambiguous but phrases are
> not. It will work when there is structured information in the form of String
> fields that are normally used for faceted navigation. It works across fields
> by building a map of search term to index field using the Lucene FieldCache
> (UninvertingReader). This enables users to create free text, multi-term
> queries that combine attributes across facet fields - as if they had searched
> and then navigated through several facet layers. To address the problem of
> exact-match only semantics of String fields, support for synonyms (including
> multi-term synonyms) and stemming was added.
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