Query blending generates and runs multiple variants of a query which are then blended into a single result set. Query blending can be performed based on a number of sources as defined in the
-qsup query processor option. This file defines the blending rules to be applied.
Query blending sources
Query blending sources are configured by setting the
-qsup query processor option.
A weighting (ranging from 0 to 1) is also defined when configuring the query blending sources.
|Spelling suggestions||SPEL||Blend with suggestions returned from the spelling suggestion system|
|US/UK spelling differences||USUK||Blend with US/UK spelling variants (eg. authorise and authorize)|
|Synonyms||SYNS||Blend with user-defined synonyms as defined in the
|Word decompounding||LANG||(Experimental) Blend with decompounded word forms (mostly for German language sites)|
Synonyms query blending source
A blending.cfg can be created within a profile folder and used for the synonyms (
SYNS) blending source.
Presenting a message in the search interface
When using a Freemarker template the
<@fb.CheckBlending> macro can be used to provide information to the user that blending has occurred. This is included in the default template:
<#if (response.resultPacket.QSups)!?size gt 0> <div class="alert alert-info"> <@fb.CheckBlending linkText="Search for <em>"+question.originalQuery+"</em> instead." tag="strong" /> </div> </#if>
Supplemental queries as generated by query blending are returned in the data model within the