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https://issues.apache.org/jira/browse/LUCENE-1993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Steinert updated LUCENE-1993:
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Attachment: MoreLikeThis.java.patch
suggested patch against current SVN head
> MoreLikeThis - allow to exclude terms that appear in too many documents
> (patch included)
> ----------------------------------------------------------------------------------------
>
> Key: LUCENE-1993
> URL: https://issues.apache.org/jira/browse/LUCENE-1993
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/*
> Affects Versions: 2.9
> Reporter: Christian Steinert
> Attachments: MoreLikeThis.java.patch
>
> Original Estimate: 0.17h
> Remaining Estimate: 0.17h
>
> The MoreLikeThis class allows to generate a likeness query based on a given
> document. So far, it is impossible to suppress words from the likeness query,
> that appear in almost all documents, making it necessary to use extensive
> lists of stop words.
> Therefore I suggest to allow excluding words for which a certain absolute
> document count or a certain percentage of documents is exceeded. Depending on
> the corpus of text, words that appear in more than 50 or even 70% of
> documents can usually be considered insignificant for classifying a document.
>
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