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# Keyword Extraction
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This code deals with identifying keywords in a document, their positions in the document,
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their important based on [TF-IDF](https://en.wikipedia.org/wiki/Tf-idf) and their grammatical
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functions based on [POS tags](https://www.ling.upenn.edu/courses/Fall_2003/ling001/penn_treebank_pos.html).
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## Central Classes
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* [DocumentKeywordExtractor](src/main/java/nu/marginalia/keyword/DocumentKeywordExtractor.java)
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## See Also
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* [libraries/language-processing](../../libraries/language-processing) does a lot of the heavy lifting.
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