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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
@@ -0,0 +1,4 @@
+The Clustering contrib plugin for Solr provides a generic mechanism for plugging in third party clustering implementations.
+It currently provides clustering support for search results using the Carrot2 project.
+
+See https://lucene.apache.org/solr/guide/result-clustering for how to get started.
@@ -0,0 +1,16 @@
+                    Apache Solr - DataImportHandler
+
+Introduction
+------------
+DataImportHandler is a data import tool for Solr which makes importing data from Databases, XML files and
+HTTP data sources quick and easy.
+
+Important Note
+--------------
+Although Solr strives to be agnostic of the Locale where the server is
+running, some code paths in DataImportHandler are known to depend on the
+System default Locale, Timezone, or Charset.  It is recommended that when
+running Solr you set the following system properties:
+  -Duser.language=xx -Duser.country=YY -Duser.timezone=ZZZ
+
+where xx, YY, and ZZZ are consistent with any database server's configuration.
@@ -0,0 +1,16 @@
+Apache Solr Content Extraction Library (Solr Cell)
+
+Introduction
+------------
+
+Apache Solr Extraction provides a means for extracting and indexing content contained in "rich" documents, such
+as Microsoft Word, Adobe PDF, etc.  (Each name is a trademark of their respective owners)  This contrib module
+uses Apache Tika to extract content and metadata from the files, which can then be indexed.  For more information,
+see http://wiki.apache.org/solr/ExtractingRequestHandler
+
+Getting Started
+---------------
+You will need Solr up and running.  Then, simply add the extraction JAR file, plus the Tika dependencies (in the ./lib folder)
+to your Solr Home lib directory.  See http://wiki.apache.org/solr/ExtractingRequestHandler for more details on hooking it in
+ and configuring.
+
@@ -0,0 +1,22 @@
+Apache Solr Language Identifier
+
+
+Introduction
+------------
+This module is intended to be used while indexing documents.
+It is implemented as an UpdateProcessor to be placed in an UpdateChain.
+Its purpose is to identify language from documents and tag the document with language code.
+The module can optionally map field names to their language specific counterpart,
+e.g. if the input is "title" and language is detected as "en", map to "title_en".
+Language may be detected globally for the document, and/or individually per field.
+Language detector implementations are pluggable.
+
+Getting Started
+---------------
+Please refer to the module documentation at http://wiki.apache.org/solr/LanguageDetection
+
+Dependencies
+------------
+The Tika detector depends on Tika Core (which is part of extraction contrib)
+The Langdetect detector depends on LangDetect library
+The OpenNLP detector depends on OpenNLP tools and requires a previously trained user-supplied model
@@ -0,0 +1,23 @@
+Welcome to Apache Solr Learning to Rank!
+========
+
+Apache Solr Learning to Rank (LTR) provides a way for you to extract features
+directly inside Solr for use in training a machine learned model.  You can then
+deploy that model to Solr and use it to rerank your top X search results.
+
+# Getting Started With Solr Learning To Rank
+
+For information on how to get started with solr ltr please see:
+ * [Solr Reference Guide's section on Learning To Rank](https://lucene.apache.org/solr/guide/learning-to-rank.html)
+
+# Getting Started With Solr
+
+For information on how to get started with solr please see:
+ * [solr/README.txt](../../README.txt)
+ * [Solr Tutorial](https://lucene.apache.org/solr/guide/solr-tutorial.html)
+
+# How To Contribute
+
+For information on how to contribute see:
+ * http://wiki.apache.org/lucene-java/HowToContribute
+ * http://wiki.apache.org/solr/HowToContribute
@@ -0,0 +1,21 @@
+Welcome to Apache Solr Prometheus Exporter
+========
+
+Apache Solr Prometheus Exporter (solr-exporter) provides a way for you to expose metrics for Solr to Prometheus.
+
+# Getting Started With Solr Prometheus Exporter
+
+For information on how to get started with solr-exporter please see:
+ * [Solr Reference Guide's section on Monitoring Solr with Prometheus and Grafana](https://lucene.apache.org/solr/guide/monitoring-solr-with-prometheus-and-grafana.html)
+
+# Getting Started With Solr
+
+For information on how to get started with solr please see:
+ * [solr/README.txt](../../README.txt)
+ * [Solr Tutorial](https://lucene.apache.org/solr/guide/solr-tutorial.html)
+
+# How To Contribute
+
+For information on how to contribute see:
+ * http://wiki.apache.org/lucene-java/HowToContribute
+ * http://wiki.apache.org/solr/HowToContribute
@@ -0,0 +1,126 @@
+#!/bin/sh
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+BASEDIR=`dirname $0`/..
+BASEDIR=`(cd "$BASEDIR"; pwd)`
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  Darwin*) darwin=true
+           if [ -z "$JAVA_VERSION" ] ; then
+             JAVA_VERSION="CurrentJDK"
+           else
+             echo "Using Java version: $JAVA_VERSION"
+           fi
+           if [ -z "$JAVA_HOME" ] ; then
+             JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Home
+           fi
+           ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# If a specific java binary isn't specified search for the standard 'java' binary
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD=`which java`
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly."
+  echo "  We cannot execute $JAVACMD"
+  exit 1
+fi
+
+if [ -z "$REPO" ]
+then
+  REPO="$BASEDIR"/lib
+fi
+
+CLASSPATH=$CLASSPATH_PREFIX
+for JAR in $(find "$REPO" -name '*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/../../dist/solrj-lib -name '*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/../../dist -name 'solr-core-*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/../../dist -name 'solr-solrj-*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/../../dist -name 'solr-prometheus-exporter-*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/lucene-libs -name '*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+for JAR in $(find "$BASEDIR"/../../server/solr-webapp/webapp/WEB-INF/lib -name '*.jar')
+do
+  CLASSPATH="$CLASSPATH":"$JAR"
+done
+
+EXTRA_JVM_ARGUMENTS="-Xmx512m -Dlog4j.configurationFile=file:"$BASEDIR"/../../server/resources/log4j2-console.xml"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$HOME" ] && HOME=`cygpath --path --windows "$HOME"`
+  [ -n "$BASEDIR" ] && BASEDIR=`cygpath --path --windows "$BASEDIR"`
+  [ -n "$REPO" ] && REPO=`cygpath --path --windows "$REPO"`
+fi
+
+exec "$JAVACMD" $JAVA_OPTS \
+  $EXTRA_JVM_ARGUMENTS \
+  -classpath "$CLASSPATH" \
+  -Dapp.name="solr-exporter" \
+  -Dapp.pid="$$" \
+  -Dapp.repo="$REPO" \
+  -Dbasedir="$BASEDIR" \
+  org.apache.solr.prometheus.exporter.SolrExporter \
+  "$@"
@@ -0,0 +1,104 @@
+@REM
+@REM  Licensed to the Apache Software Foundation (ASF) under one or more
+@REM  contributor license agreements.  See the NOTICE file distributed with
+@REM  this work for additional information regarding copyright ownership.
+@REM  The ASF licenses this file to You under the Apache License, Version 2.0
+@REM  (the "License"); you may not use this file except in compliance with
+@REM  the License.  You may obtain a copy of the License at
+@REM
+@REM      http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM  Unless required by applicable law or agreed to in writing, software
+@REM  distributed under the License is distributed on an "AS IS" BASIS,
+@REM  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@REM  See the License for the specific language governing permissions and
+@REM  limitations under the License.
+
+@echo off
+
+set ERROR_CODE=0
+
+:init
+@REM Decide how to startup depending on the version of windows
+
+@REM -- Win98ME
+if NOT "%OS%"=="Windows_NT" goto Win9xArg
+
+@REM set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" @setlocal
+
+@REM -- 4NT shell
+if "%eval[2+2]" == "4" goto 4NTArgs
+
+@REM -- Regular WinNT shell
+set CMD_LINE_ARGS=%*
+goto WinNTGetScriptDir
+
+@REM The 4NT Shell from jp software
+:4NTArgs
+set CMD_LINE_ARGS=%$
+goto WinNTGetScriptDir
+
+:Win9xArg
+@REM Slurp the command line arguments.  This loop allows for an unlimited number
+@REM of agruments (up to the command line limit, anyway).
+set CMD_LINE_ARGS=
+:Win9xApp
+if %1a==a goto Win9xGetScriptDir
+set CMD_LINE_ARGS=%CMD_LINE_ARGS% %1
+shift
+goto Win9xApp
+
+:Win9xGetScriptDir
+set SAVEDIR=%CD%
+%0\
+cd %0\..\..
+set BASEDIR=%CD%
+cd %SAVEDIR%
+set SAVE_DIR=
+goto repoSetup
+
+:WinNTGetScriptDir
+set BASEDIR=%~dp0..
+
+:repoSetup
+
+
+if "%JAVACMD%"=="" set JAVACMD=java
+
+if "%REPO%"=="" set REPO=%BASEDIR%\lib
+
+set CLASSPATH=%REPO%\*;%BASEDIR%\..\..\dist\solrj-lib\*;%BASEDIR%\..\..\dist\*;%BASEDIR%\lucene-libs\*;%BASEDIR%\..\..\server\solr-webapp\webapp\WEB-INF\lib\*
+set EXTRA_JVM_ARGUMENTS=-Xmx512m -Dlog4j.configurationFile=file:///%BASEDIR%\..\..\server\resources\log4j2-console.xml
+goto endInit
+
+@REM Reaching here means variables are defined and arguments have been captured
+:endInit
+
+%JAVACMD% %JAVA_OPTS% %EXTRA_JVM_ARGUMENTS% -classpath "%CLASSPATH_PREFIX%;%CLASSPATH%" -Dapp.name="solr-exporter" -Dapp.repo="%REPO%" -Dbasedir="%BASEDIR%" org.apache.solr.prometheus.exporter.SolrExporter %CMD_LINE_ARGS%
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+if "%OS%"=="Windows_NT" @endlocal
+set ERROR_CODE=1
+
+:end
+@REM set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" goto endNT
+
+@REM For old DOS remove the set variables from ENV - we assume they were not set
+@REM before we started - at least we don't leave any baggage around
+set CMD_LINE_ARGS=
+goto postExec
+
+:endNT
+@endlocal
+
+:postExec
+
+if "%FORCE_EXIT_ON_ERROR%" == "on" (
+  if %ERROR_CODE% NEQ 0 exit %ERROR_CODE%
+)
+
+exit /B %ERROR_CODE%