Papers › Fusing Heterogeneous Factors with Triaffine Mechanism for Nested Named Entity Recognition
Fusing Heterogeneous Factors with Triaffine Mechanism for Nested Named Entity Recognition
Zheng Yuan, Chuanqi Tan, Songfang Huang, Fei Huang
Nested entities are observed in many domains due to their compositionality, which cannot be easily recognized by the widely-used sequence labeling framework. A natural solution is to treat the task as a span classification problem. To learn better span representation and increase classification performance, it is crucial to effectively integrate heterogeneous factors including inside tokens, boundaries, labels, and related spans which could be contributing to nested entities recognition. To fuse these heterogeneous factors, we propose a novel triaffine mechanism including triaffine attention and scoring. Triaffine attention uses boundaries and labels as queries and uses inside tokens and related spans as keys and values for span representations. Triaffine scoring interacts with boundaries and span representations for classification. Experiments show that our proposed method outperforms previous span-based methods, achieves the state-of-the-art F₁ scores on nested NER datasets GENIA and KBP2017, and shows comparable results on ACE2004 and ACE2005.
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Code
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Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Nested Named Entity Recognition | ACE 2004 | Triaffine + ALBERT | F1 | 88.56 | #3 of 24 | Archive leaderboard | report |
| Nested Named Entity Recognition | ACE 2004 | Triaffine + BioBERT | F1 | 87.40 | #12 of 24 | Archive leaderboard | report |
| Nested Named Entity Recognition | ACE 2005 | Triaffine + ALBERT | F1 | 88.83 | #2 of 25 | Archive leaderboard | report |
| Nested Named Entity Recognition | ACE 2005 | Triaffine + BERT | F1 | 86.82 | #7 of 25 | Archive leaderboard | report |
| Nested Named Entity Recognition | GENIA | Triaffine + BioBERT | F1 | 81.23 | #5 of 26 | Archive leaderboard | report |
| Nested Named Entity Recognition | TAC-KBP 2017 | Triaffine + ALBERT | F1 | 87.27 | #1 of 3 | Archive leaderboard | report |
| Nested Named Entity Recognition | TAC-KBP 2017 | Triaffine + BERT | F1 | 85.05 | #2 of 3 | 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.
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