[jira] [Resolved] (LUCENE-6939) BlendedInfixSuggester to support exponential reciprocal BlenderType

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless resolved LUCENE-6939.
----------------------------------------
       Resolution: Fixed
    Fix Version/s: Trunk
                   5.5

Thanks [~arcadius]!

> BlendedInfixSuggester to support exponential reciprocal BlenderType
> -------------------------------------------------------------------
>
>                 Key: LUCENE-6939
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6939
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/spellchecker
>    Affects Versions: 5.4
>            Reporter: Arcadius Ahouansou
>            Priority: Minor
>              Labels: suggester
>             Fix For: 5.5, Trunk
>
>         Attachments: LUCENE-6939.patch
>
>
> The orignal BlendedInfixSuggester introduced in LUCENE-5354 has support for:
> - {{BlenderType.POSITION_LINEAR}} and 
> - {{BlenderType.POSITION_RECIPROCAL}} .
> These are used to score documents based on the position of the matched token i.e the closer is the matched term to the beginning, the higher score you get.
> In some use cases, we need a more aggressive scoring based on the position.
> That's where the exponential reciprocal comes into play 
> i.e 
> {{coef = 1/Math.pow(position+1, exponent)}}
> where the {{exponent}} is a configurable variable.



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