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https://issues.apache.org/jira/browse/LUCENE-3846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221985#comment-13221985
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Michael McCandless commented on LUCENE-3846:
--------------------------------------------
This is a nice benefit of the path-based best-first search (in the patch): it's
easy to use a custom cost matrix. The cost can also be context-dependent too
(based on past matched characters, though not [easily] future ones).
We don't need to explore that now, before committing this, but it's nice that
we'll have the freedom to do so later.
Re-ranking definitely adds cost since you'll have to pull a bigger N. I think
we'll likely have to somehow combine the cost and "isFuzzy" into a single cost,
during the search, not after (reranking). Not sure how to do that yet...
> Fuzzy suggester
> ---------------
>
> Key: LUCENE-3846
> URL: https://issues.apache.org/jira/browse/LUCENE-3846
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.6, 4.0
>
> Attachments: LUCENE-3846.patch
>
>
> Would be nice to have a suggester that can handle some fuzziness (like spell
> correction) so that it's able to suggest completions that are "near" what you
> typed.
> As a first go at this, I implemented 1T (ie up to 1 edit, including a
> transposition), except the first letter must be correct.
> But there is a penalty, ie, the "corrected" suggestion needs to have a much
> higher freq than the "exact match" suggestion before it can compete.
> Still tons of nocommits, and somehow we should merge this / make it work with
> analyzing suggester too (LUCENE-3842).
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