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solr/solr-7.7.2/contrib/analysis-extras/README.txt

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+The analysis-extras plugin provides additional analyzers that rely
+upon large dependencies/dictionaries.
+
+It includes integration with ICU for multilingual support,
+analyzers for Chinese and Polish, and integration with
+OpenNLP for multilingual tokenization, part-of-speech tagging
+lemmatization, phrase chunking, and named-entity recognition.
+
+ICU relies upon lucene-libs/lucene-analyzers-icu-X.Y.jar
+and lib/icu4j-X.Y.jar
+
+Smartcn relies upon lucene-libs/lucene-analyzers-smartcn-X.Y.jar
+
+Stempel relies on lucene-libs/lucene-analyzers-stempel-X.Y.jar
+
+Morfologik relies on lucene-libs/lucene-analyzers-morfologik-X.Y.jar
+and lib/morfologik-*.jar
+
+OpenNLP relies on lucene-libs/lucene-analyzers-opennlp-X.Y.jar
+and lib/opennlp-*.jar