Papers › NCRF++: An Open-source Neural Sequence Labeling Toolkit

NCRF++: An Open-source Neural Sequence Labeling Toolkit

14 Jun 2018ACL 2018 7arXiv:1806.05626archive 2025-07-28

Jie Yang, Yue Zhang

This paper describes NCRF++, a toolkit for neural sequence labeling. NCRF++ is designed for quick implementation of different neural sequence labeling models with a CRF inference layer. It provides users with an inference for building the custom model structure through configuration file with flexible neural feature design and utilization. Built on PyTorch, the core operations are calculated in batch, making the toolkit efficient with the acceleration of GPU. It also includes the implementations of most state-of-the-art neural sequence labeling models such as LSTM-CRF, facilitating reproducing and refinement on those methods.

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Code

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jiesutd/NCRFpp officialmentioned in papermentioned on GitHubpytorch report
jiesutd/PyTorchSeqLabel mentioned on GitHubpytorchApache-2.0 report

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Code Syntology ran Syntology

9 samples harvested; 1 ran; 0 honoured the contract we drafted; 8 have no recorded run. Read from Syntology's graph 2026-09-24; that is when this build read the record, not when the samples ran.

1ran · our draft was wrong
8unverified

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log_sum_exp jiesutd/PyTorchSeqLabel/model/crf.py community (archive-listed) ran · our draft was wrong fingerprinted Apache-2.0 (permissive) · 8e960fbb64668568 · report
build_pretrain_embedding jiesutd/PyTorchSeqLabel/utils/functions.py community (archive-listed) unverified Apache-2.0 (permissive) · 73cae25332218360 · report
config_file_to_dict jiesutd/PyTorchSeqLabel/utils/data.py community (archive-listed) unverified Apache-2.0 (permissive) · fa74990a86a30699 · report
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predict_check jiesutd/PyTorchSeqLabel/main_parse.py community (archive-listed) unverified Apache-2.0 (permissive) · aaa3111ce53d90b2 · report
read_instance jiesutd/PyTorchSeqLabel/utils/functions.py community (archive-listed) unverified Apache-2.0 (permissive) · d3f2fbee57872af8 · report
recover_label jiesutd/PyTorchSeqLabel/main_parse.py community (archive-listed) unverified Apache-2.0 (permissive) · 32ca37a4d4b774d3 · report
recover_nbest_label jiesutd/PyTorchSeqLabel/main_parse.py community (archive-listed) unverified Apache-2.0 (permissive) · d063cd5337b072b7 · report
str2bool jiesutd/PyTorchSeqLabel/utils/data.py community (archive-listed) unverified Apache-2.0 (permissive) · 89bc3ed968d941b8 · report

Tasks

ChunkingNamed Entity Recognition (NER)Part-Of-Speech Tagging

1 archive task tag without a task page not shown.

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Chunking Penn Treebank NCRF++ F1 score 95.06 #7 of 8 Archive leaderboard report
Named Entity Recognition (NER) CoNLL 2003 (English) NCRF++ F1 91.35 #64 of 73 Archive leaderboard report
Part-Of-Speech Tagging Penn Treebank NCRF++ Accuracy 97.49 #14 of 20 Archive leaderboard report

Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.

Methods

CRF

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