crf++

Conditional random fields tool for sequence labeling and segmentation

brewmacoslinux

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Conditional random fields for segmenting/labeling sequential data

crf_learncrf_test

Train a CRF model on labeled training data$ crf_learn -c 1.0 template_file train.txt model.bin

Test the trained model on new data and output predictions$ crf_test -m model.bin test.txt > predictions.txt

Train with custom parameters for regularization$ crf_learn -c 0.5 -f 2 -p template_file train.txt model.bin