Arabic Treebank: Part 2 v 2.0

Item Name: Arabic Treebank: Part 2 v 2.0
Author(s): Mohamed Maamouri, Ann Bies, Tim Buckwalter, Hubert Jin
LDC Catalog No.: LDC2004T02
ISBN: 1-58563-282-1
ISLRN: 530-268-392-589-4
Release Date: January 30, 2004
Member Year(s): 2004
DCMI Type(s): Text
Data Source(s): newswire
Project(s): TIDES, GALE
Application(s): natural language processing, information detection, cross-lingual information retrieval, automatic content extraction
Language(s): Standard Arabic
Language ID(s): arb
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2004T02 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Maamouri, Mohamed, et al. Arabic Treebank: Part 2 v 2.0 LDC2004T02. Web Download. Philadelphia: Linguistic Data Consortium, 2004.
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Arabic Treebank: Part 2 v 2.0 was produced by Linguistic Data Consortium (LDC) catalog number LDC2004T02 and ISBN 1-58563-282-1.

This publication is the second part of a corpus of 1,000,000 words of Arabic Treebank, designed to support language research and development of language technology for Modern Standard Arabic. Part one was released in 2003 as Arabic Treebank: Part 1 v 2.0, having the source data extracted from Agence France Press stories. The current Arabic Treebank: Part 2 v 2.0 corpus consists of stories from Al-Hayat distributed by Ummah.


This corpus includes 501 stories from the Ummah Arabic News Text. There are a total of 144,199 words (counting non-Arabic tokens such as numbers and punctuation) in the 501 files - one story per file. New features of annotation include complete vocalization (including case endings), lemma IDs, and more specific POS tags for verbs and particles.

The corpus contains 125,698 Arabic-only word tokens (prior to the separation of clitics), of which 124,740 (99.24%) were provided with an acceptable morphological analysis and POS tag by the morphological parser, and 958 (0.76%) were items that the morphological parser failed to analyze correctly.


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