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https://issues.apache.org/jira/browse/LUCENE-6939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15283437#comment-15283437
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Arcadius Ahouansou commented on LUCENE-6939:
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Hello [~erickerickson]
I can see you have updated the wiki with {{linear}}->{{position_linear}} and
{{reciprocal}}->{{position_reciprocal}}
Thank you very much for that [~erickerickson]
We need a new bullet point for the new blenderType, just below
{{position_reciprocal}} at the same level:
{quote}
{{position_exponential_reciprocal}}: weightFieldValue/Math.pow(1+position,
exponent). This is a more aggressive and more configurable version of the
{{position_reciprocal}} with a configurable variable {{exponent}}. When
{{exponent}}==1.0, then both {{position_exponential_reciprocal}} and
{{position_reciprocal}} are equivalent and lead to the same result.
{quote}
Then, we will need a new bullet point outside of the BlenderType and just above
numFactor:
{quote}
{{exponent}}: an optional configuration variable for the
{{position_exponential_reciprocal}} blenderType. It is a decimal number used to
control how fast the score will grow or decrease. Its default value 2.0
{quote}
Many thanks
> 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, 6.0
>
> 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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