Multi-head three-affine attention mechanism for nested named entity recognition

Abstract Named Entity Recognition (NER) is commonly treated as a sequence labeling task, which encounters significant challenges when named entities appear in nested forms. Span-based methods, which enumerate all possible spans in a sentence as candidate entities and then classify them, provide a st...

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Autori principali:	Yuelong Zhang, Songpu Li, Tingyao Jiang, Xiaosheng Yu, Xiaolong Li, Tianrui Lyu, Guoqiu He, Wenyuan Zhou, Yingrui Fu, Yangxi Zhang
Natura:	Artigo
Lingua:	Inglês
Pubblicazione:	Springer 2026-05-01
Serie:	Discover Artificial Intelligence
Soggetti:	Multi-head Tri-affine mechanism Attention mechanism Nested named entity Span
Accesso online:	https://doi.org/10.1007/s44163-026-01357-2
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