Chinese Treebank 5.0


Item Name: Chinese Treebank 5.0
Authors: Martha Palmer, Fu-Dong Chiou, Nianwen Xue, and Tsan-Kuang Lee
LDC Catalog No.: LDC2005T01
ISBN: 1-58563-323-2
Release Date: Jan 15, 2005
Data Type: text
Data Source(s): newswire
Project(s): GALE, TIDES
Application(s): natural language processing, parsing, tagging
Language(s): Mandarin Chinese
Language ID(s): cmn
Distribution: 1 CD
Member fee: $0 for 2005 members
Non-member Fee: US $300.00
Reduced-License Fee: US $150.00
Extra-Copy Fee: US $150.00
Non-member License: yes
Online documentation: yes
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Martha Palmer, et al.
2005
Chinese Treebank 5.0
Linguistic Data Consortium, Philadelphia

Introduction

Chinese Treebank 5.0 was produced by Linguistic Data Consortium (LDC) catalog number LDC2005T01 and ISBN 1-58563-323-2.

The Penn Chinese Treebank is an ongoing project that started in the summer of 1998. The goal of the project is to create a 500,000-word corpus of Chinese text with syntactic bracketing. Chinese Treebank 1.0 was first published in 2000, and it was later corrected and released in 2001 as Chinese Treebank 2.0. Another updated version was released in 2004 as Chinese Treebank 4.0. More information about the project is available on the Penn Chinese Treebank website.

The content used in this corpus comes from the following newswire sources:

698 articles Xinhua (1994-1998)
55 articles Information Services Department of HKSAR (1997)
132 articles Sinorama magazine, Taiwan (1996-1998 & 2000-2001)

Data

Chinese Treebank 5.0 contains 507,222 words, 824,983 Hanzi, 18,782 sentences, and 890 data files.

All files are GB encoded. The format of Chinese Treebank 5.0 is the same as the Penn English Treebank. All files have been annotated at least twice. The first pass was done by one annotator, and the resulting files were checked by a second annotator (second pass). Some files were also double-blind annotated and then adjudicated to create gold standard files.

The corpus provides four versions of files: bracketed, raw, segmented and postagged. The raw, segmented and postagged versions are generated from the bracketed version and so do not reflect the previous annotation stages. The bracketed files are sequentially named as follows: chtb_nnnn.fid, where nnnn is a sequential file number.

Samples

To see an example of Gold Standard file, please examine this sample.

Updates

Information on the update to version 5.1 can be found here.

Copyright

Portions 1994-1998 Xinhua News Agency, 1996-2001 Sinorama Magazine, 1997 The Government of the Hong Kong Special Administrative Region, 2001, 2004, 2005 Trustees of the University of Pennsylvania