QCRI Advanced Tools for ARAbic (QATARA) is a Library of a statistical Tokenizer, Part of Speech, Named Entities, Gender and Number Tagger, and a Diacritizer that was trained using Conditional Random Fields (CRF++). CRF have been used for segmenting/labeling data among other NLP tasks.

QATARA Library. Latest release

You may check-out also the latest version from the githup repository: https://github.com/Qatar-Computing-Research-Institute/Qatara Data directory is not included. Download the data from http://alt.qcri.org/tools/qatara/data.tgz

Check the QATARA demo online from http://qatsdemo.cloudapp.net/qatara/.

Package content, files, folders

1 - Command line:

java -Xmx2048m -Djava.library.path=../data/ -cp ./lib/ArabicPOSTaggerLib.jar:./lib/CRFPP.jar:./lib/trove-3.0.3.jar:./lib/weka.jar:./dist/ProcessDiacritizedLexicon.jar:. QataraLib <options> < [file to parse]

Parameters:

QataraLib <--help|-h> [--task|-t pos|tok|ner|diac] [--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   
*               diac:  Diacritize text
*
*  --klm		kenlmdir :  Directory with kenlm binary
* 

Example:

java -Xmx2048m -Djava.library.path=../data/ -cp ./lib/ArabicPOSTaggerLib.jar:./lib/CRFPP.jar:./lib/trove-3.0.3.jar:./lib/weka.jar:./dist/ProcessDiacritizedLexicon.jar:. QataraLib -t diac < testfile.txt

For Windows Environment: You may require to explicitly specify the library path:

java -Xmx1024m -Djava.library.path=./data/ -cp ./lib/ArabicPOSTaggerLib.jar:./lib/CRFPP.jar:./lib/trove-3.0.3.jar:./lib/weka.jar:./dist/ProcessDiacritizedLexicon.jar:. QataraLib -t diac < testfile.txt

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:

• ArabicPOSTaggerLib.jar http://alt.qcri.org/tools/apost/

• 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/ To build CRFPP and kenlm, See ArabicPOSTaggerLib documentation.

• 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/

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If you have any problem, question please contact [email protected] or [email protected].

URL for the project and the latest news and downloads http://alt.qcri.org/tools/qatara

Where to download the latest version, https://github.com/Qatar-Computing-Research-Institute/Qatara

QATARA 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 2015 QCRI