Conditional Random Fields (CRF)

You will need to grab my arsenal repository and stick it on your python path.

Example data for citation segmentation is included as well as very simple feature extraction (not a serious feature set).

• L2 regularization for sgd. Don't know how to do it with perceptron.
• look at Leon Buttou's and Charles Sutton's notes on learning rates for sgd.
• L-BFGS optimization
• parameter averaging for sgd and perceptron