Arabic POS Tagger Library is a statistical Tokenizer, Part of Speech and Named Entities Tagger
that was trained using Conditional Random Fields (CRF++).
CRF have been used for segmenting/labeling sequential data among other NLP tasks.
Package content, files, folders
1 - Command line:
java -Xmx800m -Djava.library.path=. -jar ArabicPOSTaggerLib.jar <options> < [file to parse]
Parameters:
ArabicPOSTaggerLib.jar <--help|-h> [--task|-t pos|tok|ner] [--klm|-k kenlmDir] < filename"
* options:
* --help display help information
* --task tok: Parse file using tokenization model
* pos: Parse file using both tokenization and pos models
* ner: Parse file using tokenization, pos and named entities models
*
* --klm kenlmdir : Directory with kenlm binary
*
Example:
java -Xmx2800m -Djava.library.path=./data/ -jar ArabicPOSTaggerLib.jar -t pos < Tweets.txt
For Windows Environment: You may require to explicitly specify the library path:
java -Xmx1024m -Djava.library.path=./data/ -jar ArabicPOSTaggerLib.jar -t pos -k models < Tweets1.txt
2- Java API: See java documentation for class ArabicPOSTagger.testCase using the following methods:
public static void processFile(java.lang.String dataDirectory,
java.lang.String kenlmDirectory,
java.lang.String inputFile,
java.lang.String outputFile,
boolean bDenormalizeText,
int mode)
public static void processSTDIN(java.lang.String dataDirectory,
java.lang.String kenlmDirectory,
int mode,
boolean bDenormalizeText)
Build the jar:
ant jar
Deploy the package to other direcotory:
ant deploy -Do=<Dest Dir>
Arabic Text Analyzer used Java Native Interface (JNI) wrapper to access CRF++ functionalilies: Two files needed from the CRF++ which are:
- CRFPP.jar
- and a platform depandent library
- libCRFPP.jnilib -for Mac OS-
- libCRFPP.so -for Linux 86_64-
- CRFPP.dll -for Windows-
You can download the source code for CRF++ from http://code.google.com/p/crfpp/ More details about compiling and building CRF++ is provided below.
- kenlm langauage model KenLM langauge model binary for querying. This is used used for denormalization using the inpur text as a query; denormalized text is generated. The source code could be downloaded from http://kheafield.com/code/kenlm/
===
To build CRFPP.jar:
cd <CRF++ MainDir>/java
make
To build libCRFPP.jnilib:
cd <CRF++ MainDir>/java
make
g++ -dynamiclib -Wl,-undefined -Wl,dynamic_lookup -o libCRFPP.jnilib .libs/libcrfpp.o .libs/lbfgs.o .libs/param.o .libs/encoder.o .libs/feature.o .libs/feature_cache.o .libs/feature_index.o .libs/node.o .libs/path.o .libs/tagger.o java/CRFPP_wrap.o -lpthread -lm
To build libCRFPP.so (Linux):
cd <CRF++ MainDir>/java
make
g++ -fPIC -DPIC -shared -nostdlib /usr/lib/crti.o /usr/lib/gcc/i486-linux-gnu/4.4.3/crtbeginS.o .libs/libcrfpp.o .libs/lbfgs.o .libs/param.o .libs/encoder.o .libs/feature.o .libs/feature_cache.o .libs/feature_index.o .libs/node.o .libs/path.o .libs/tagger.o ./java/CRFPP_wrap.o -lpthread -L/usr/lib/gcc/i486-linux-gnu/4.4.3 -L/usr/lib -L/usr/lib/i486-linux-gnu -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/i486-linux-gnu/4.4.3/crtendS.o /usr/lib/crtn.o -O3 -mieee-fp -Wl,-soname -Wl,libcrfpp.so.0 -o libCRFPP.so
For Windows environment:
- Copy the Makefile.lib.msvc to <CRF++ MainDir>
- access <CRF++ MainDir>
- run "nmake -f Makefile.lib.msvc" to build CRFPP.dll
- access <CRF++ MainDir>/java
- run "nmake" or "javac org/chasen/crfpp/*.java"
- jar cfv CRFPP.jar org/chasen/crfpp/*.class
Copy both files to the Arabic Text Analyzer root dir or other destination with the ArabicAnalyzer.jar
If you have any problem, question please contact [email protected] or [email protected].
URL for the project and the latest news and downloads https://github.com/Qatar-Computing-Research-Institute/ArabicPOSTLib
Where to download the latest version, https://github.com/Qatar-Computing-Research-Institute/ArabicPOSTLib
Arabic POS Tagger Library code is made public for RESEARCH purpose only, except the binaries and libraries in the depadencies which have their own licenses, listed below. See the references in these files for more details.
- CRF++
- KenLM
For the rest:
QATARA Library is being made public for research purpose only.
For non-research use, please contact:
Kareem M. Darwish <[email protected]>
Ahmed Abdelali <[email protected]>
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Copyright 2013 QCRI
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