English-Arabic Treebank v 1.0

Item Name: English-Arabic Treebank v 1.0
Author(s): Ann Bies
LDC Catalog No.: LDC2006T10
ISBN: 1-58563-387-9
ISLRN: 021-421-953-520-4
DOI: https://doi.org/10.35111/7dp6-6613
Release Date: May 18, 2006
Member Year(s): 2006
DCMI Type(s): Text
Data Source(s): newswire
Project(s): GALE
Application(s): automatic content extraction, cross-lingual information retrieval, machine translation
Language(s): English, Standard Arabic
Language ID(s): eng, arb
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2006T10 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Bies, Ann. English-Arabic Treebank v 1.0 LDC2006T10. Web Download. Philadelphia: Linguistic Data Consortium, 2006.
Related Works: View


English-Arabic Parallel Treebank v 1.0 was developed by the Linguistic Data Consortium (LDC) and consists of 52,238 words in 224 files of individual Agence France Presse (AFP) news stories.

The AFP stories included here correspond to approximately the first 50K words of Arabic Treebank: Part 1 v 3.0 (LDC2005T02). The English translation was provided by LDC, and was part-of-speech tagged and treebanked for this project.


The guidelines followed for both part-of-speech and treebank annotation are essentially Penn Treebank II style, with two notable differences:

  1. POS: tokenization of hyphenated items ("New York-based" has been replaced by "New York - based" for example), and the addition of HYPH and AFX tags necessitated by this change in tokenization
  2. TreeBank: the addition of the node label NML for sub-NP nominal constituents (replacing NX and most NP-internal NAC)

More detailed addenda to the Penn Treebank II guidelines and a mapping from the original Arabic Treebank filenames to the current filenames used in this release can be found in the associated documentation.


For an example of the data in this corpus, please review this text sample.


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