Part-of-speech tagging

Part-of-speech tagging is the task of assigning a part-of-speech tag to each word in a given text.

<math>u' = u^2\,</math>

Software

• Citar - uses trigram-based HMMs. Free, open source license.
• CRF++ - uses Conditional random fields. Free, open source license.
• CRFTagger - for English. Free, open source license.
• GPoSTTL - Enhanced TBL tagger for English. Open source license.
• HunPos - uses trigram-based HMMs. Free, open source license.
• LBJ POS Tagger - Uses Averaged Perceptron based sequential model. Java API, Free, open source license.
• Memory-based tagger (MBT) - uses TiMBL. Free, open source license.
• Stanford Tagger - uses Maximum entropy models. Free, open source license.
• SVMTool - uses Support vector machines. Free, open source license.

See also

• POS Tagging (State of the art)

External links

• Wikipedia article on POS tagging