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https://issues.apache.org/jira/browse/LUCENE-1550?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Morton updated LUCENE-1550:
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Attachment: LUCENE-1550.patch
Patch includes implementation of n-gram string matching.
This implementation uses the position-based optimization to compute partial
matches of n-gram sub-strings and adds a null-character prefix of size n-1 so
that the first character is contained in the same number of n-grams as a middle
character. Null-character prefix matches are discounted so that strings with
no matching characters will return a distance of 0.
Includes test cases.
Fixes javadoc description of StringDistance to reflect that 1 is used for the
same string and 0 for non-matching.
> Add N-Gram String Matching for Spell Checking
> ---------------------------------------------
>
> Key: LUCENE-1550
> URL: https://issues.apache.org/jira/browse/LUCENE-1550
> Project: Lucene - Java
> Issue Type: New Feature
> Components: contrib/spellchecker
> Affects Versions: 2.9
> Reporter: Thomas Morton
> Fix For: 2.9
>
> Attachments: LUCENE-1550.patch
>
>
> N-Gram version of edit distance based on paper by Grzegorz Kondrak, "N-gram
> similarity and distance". Proceedings of the Twelfth International Conference
> on String Processing and Information Retrieval (SPIRE 2005), pp. 115-126,
> Buenos Aires, Argentina, November 2005.
> http://www.cs.ualberta.ca/~kondrak/papers/spire05.pdf
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