KONNO, Hiroharu created LUCENE-6837:
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Summary: Add N-best output capability to JapaneseTokenizer
Key: LUCENE-6837
URL: https://issues.apache.org/jira/browse/LUCENE-6837
Project: Lucene - Core
Issue Type: Improvement
Components: modules/analysis
Affects Versions: 5.3
Reporter: KONNO, Hiroharu
Priority: Minor
Japanese morphological analyzers often generate mis-segmented tokens. N-best
output reduces the impact of mis-segmentation on search result. N-best output
is more meaningful than character N-gram, and it increases hit count too.
If you use N-best output, you can get decompounded tokens (ex: "シニアソフトウェアエンジニア"
=> {"シニア", "シニアソフトウェアエンジニア", "ソフトウェア", "エンジニア"}) and overwrapped tokens (ex:
"数学部長谷川" => {"数学", "部", "部長", "長谷川", "谷川"}), depending on the dictionary and
N-best parameter settings.
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