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From "Michael McCandless (JIRA)" <>
Subject [jira] Commented: (LUCENE-2507) automaton spellchecker
Date Fri, 01 Oct 2010 09:42:33 GMT


Michael McCandless commented on LUCENE-2507:

This is an awesome step forward!

It requires no parallel index, and, it gets better accuracy (if your metric is edit distance
like) at a negligible perf hit.

It's great that it leverages the absurd speedups we've made to FuzzyQuery in 4.0.

> automaton spellchecker
> ----------------------
>                 Key: LUCENE-2507
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/spellchecker
>            Reporter: Robert Muir
>            Assignee: Robert Muir
>             Fix For: 4.0
>         Attachments: LUCENE-2507.patch, LUCENE-2507.patch, LUCENE-2507.patch, LUCENE-2507.patch
> The current spellchecker makes an n-gram index of your terms, and queries this for spellchecking.
> The terms that come back from the n-gram query are then re-ranked by an algorithm such
as Levenshtein.
> Alternatively, we could just do a levenshtein query directly against the index, then
we wouldn't need
> a separate index to rebuild.

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