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Apache Lucene
Copyright 2019 The Apache Software Foundation
The snowball stemmers in
contrib/analyzers/common/src/java/net/sf/snowball
were developed by Martin Porter and Richard Boulton.
The snowball stopword lists in
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/snowball
were developed by Martin Porter and Richard Boulton.
The full snowball package is available from
http://snowball.tartarus.org/
The KStem stemmer in
common/src/org/apache/lucene/analysis/en
was developed by Bob Krovetz and Sergio Guzman-Lara (CIIR-UMass Amherst)
under the BSD-license.
The Arabic,Persian,Romanian,Bulgarian, and Hindi analyzers (contrib/analyzers) come with a default
stopword list that is BSD-licensed created by Jacques Savoy. These files reside in:
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/ar/stopwords.txt,
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/fa/stopwords.txt,
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/ro/stopwords.txt,
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/bg/stopwords.txt,
contrib/analyzers/common/src/resources/org/apache/lucene/analysis/hi/stopwords.txt
See http://members.unine.ch/jacques.savoy/clef/index.html.
The German,Spanish,Finnish,French,Hungarian,Italian,Portuguese,Russian and Swedish light stemmers
(common) are based on BSD-licensed reference implementations created by Jacques Savoy and
Ljiljana Dolamic. These files reside in:
contrib/analyzers/common/src/java/org/apache/lucene/analysis/de/GermanLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/de/GermanMinimalStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/es/SpanishLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/fi/FinnishLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/fr/FrenchLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/fr/FrenchMinimalStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/hu/HungarianLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/it/ItalianLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/pt/PortugueseLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianLightStemmer.java
contrib/analyzers/common/src/java/org/apache/lucene/analysis/sv/SwedishLightStemmer.java
The Stempel analyzer (contrib/analyzers) includes BSD-licensed software developed
by the Egothor project http://egothor.sf.net/, created by Leo Galambos, Martin Kvapil,
and Edmond Nolan.
The Polish analyzer (contrib/analyzers) comes with a default
stopword list that is BSD-licensed created by the Carrot2 project. The file resides
in contrib/analyzers/stempel/src/resources/org/apache/lucene/analysis/pl/stopwords.txt.
See http://project.carrot2.org/license.html.
Includes lib/servlet-api-2.4.jar from Apache Tomcat
Includes lib/ant-1.7.1.jar and lib/ant-junit-1.7.1.jar from Apache Ant
Includes contrib/queries/lib/jakarta-regexp-1.4.jar from Apache Jakarta Regexp
Includes software from other Apache Software Foundation projects,
including, but not limited to:
- Commons Beanutils (contrib/benchmark/lib/commons-beanutils-1.7.0.jar)
- Commons Collections (contrib/benchmark/lib/commons-collections-3.1.jar)
- Commons Compress (contrib/benchmark/lib/commons-compress-1.0.jar)
- Commons Digester (contrib/benchmark/lib/commons-digester-1.7.jar)
- Commons Logging (contrib/benchmark/lib/commons-logging-1.0.4.jar)
- Xerces (contrib/benchmark/lib/xercesImpl-2.9.1-patched-XERCESJ-1257.jar)
The SmartChineseAnalyzer source code (under contrib/analyzers) was
provided by Xiaoping Gao and copyright 2009 by www.imdict.net.
ICU4J, (under contrib/icu) is licensed under an MIT styles license
(contrib/icu/lib/ICU-LICENSE.txt) and Copyright (c) 1995-2008
International Business Machines Corporation and others
Some files (contrib/analyzers/common/src/test/.../WordBreakTestUnicode_*.java
and data files under contrib/icu/src/data/) are derived from Unicode data such
as the Unicode Character Database. See http://unicode.org/copyright.html for more
details.
The class org.apache.lucene.SorterTemplate was inspired by CGLIB's class with
the same name. The implementation part is mainly done using pre-existing
Lucene sorting code. In-place stable mergesort was borrowed from CGLIB,
which is Apache-licensed.
The Google Code Prettify is Apache License 2.0.
See http://code.google.com/p/google-code-prettify/
JUnit (under lib/junit-4.7.jar) is licensed under the Common Public License v. 1.0
See http://junit.sourceforge.net/cpl-v10.html
JLine (under contrib/lucli/lib/jline.jar) is licensed under the BSD License.
See http://jline.sourceforge.net/
This product includes code (JaspellTernarySearchTrie) from Java Spelling Checking Package (jaspell): http://jaspell.sourceforge.net/
License: The BSD License (http://www.opensource.org/licenses/bsd-license.php)
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