https://github.com/gatenlp/gateplugin-tagger_np_chunking

A GATE based implementation of the Ramshaw and Marcaus BaseNP chunker
https://github.com/gatenlp/gateplugin-tagger_np_chunking

Last synced: about 2 months ago
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A GATE based implementation of the Ramshaw and Marcaus BaseNP chunker

• Host: GitHub
• URL: https://github.com/gatenlp/gateplugin-tagger_np_chunking
• Owner: GateNLP
• License: lgpl-3.0
• Created: 2017-06-22T11:49:07.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2023-02-10T11:56:38.000Z (almost 2 years ago)
• Last Synced: 2024-04-16T07:59:26.524Z (9 months ago)
• Language: Java
• Homepage:
• Size: 49.8 KB
• Stars: 0
• Watchers: 14
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# NP Chunker

Copyright (C) 2003-2017 The University of Sheffield

## DESCRIPTION

The application is a Java implementation of a the Ramshaw and Marcaus

BaseNP chunker (in fact the files in the resources directory are

taken straight from their original distribution) which attempts to

insert brackets marking noun phrases in text which has been marked

with POS tags in the same format as the output of Eric Brill's

transformational tagger. The output from this version should be

identical to the output of the oringinal C++/Perl version released

by Ramshaw and Marcus.

A wrapper is also included which allows the easy use of this chunker

within the GATE framework (http://gate.ac.uk).

For more information about baseNP structures and the use of

tranformation-based learning to derive them, see "Text Chunking

Using Transformation-Based Learning", Lance Ramshaw & Mitchell Marcus,

Proceedings of the Third ACL Workshop on Very Large Corpora, MIT,

June, 1995 (http://xxx.lanl.gov/e-print/cmp-lg/9505040)

## DIFFERENCES FROM THE ORIGINAL

The major difference is the assumption is made that if a POS tag is

is not in the mapping file then it is tagged as 'I'. The original

version simply failed if an unknown POS tag was encountered.

When using the GATE wrapper the unknown chunk tag can be changed from

'I' to any other legal tag (B or O).