[CTAKES-186] Add ClearNLP POSTagger as optional AE to choose from

• Type: New Feature
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0-incubating
• Fix Version/s: 3.1.0
• Component/s: ctakes-pos-tagger
• Assignee: Pei Chen
• Reporter: Pei Chen
• Created: 09/Apr/13 20:24
• Updated: 09/Apr/13 20:29
• Resolved: 09/Apr/13 20:29

Description

Add ClearNLP POSTagger as optional AE to choose from.
While working on the Dependency Parser/SRL labeler, we also have a POSTagger from ClearNLP. It is fairly simple and I have the code ready (also trained on the same data as the dep parser- MiPaq/SHARP) to be checked-in.
"The ClearNLP POS tagger shows more robust results on unknown words by generalizing lexical features. You can find the reference from this paper.
Fast and Robust Part-of-Speech Tagging Using Dynamic Model Selection, Jinho D. Choi, Martha Palmer, Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics (ACL'12), 363-367, Jeju, Korea, 2012. [1] It also uses AdaGrad for machine learning, which is a more advanced learning algorithm than maximum entropy used by OpenNLP."

[1] http://aclweb.org/anthology-new/P/P12/P12-2071.pdf