MoreLikeThis - allow to exclude terms that appear in too many documents (patch
included)
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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
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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