Multi-label sequence generating model via label semantic attention mechanism

In recent years, a new attempt has been made to capture label co-occurrence by applying the sequence-to-sequence (Seq2Seq) model to multi-label text classification (MLTC). However, existing approaches frequently ignore the semantic information contained in the labels themselves. Besides, the Seq2Seq model is susceptible to the negative impact of label sequence order. Furthermore, it has been demonstrated that the traditional attention mechanism underperforms in MLTC. Therefore, we propose a novel Seq2Seq model with a different label semantic attention mechanism (S2S-LSAM), which generates fused information containing label and text information through the interaction of label semantics and text features in the label semantic attention mechanism. With the fused information, our model can select the text features that are most relevant to the labels more effectively. A combination of the cross-entropy loss function and the policy gradient-based loss function is employed to reduce the label sequence order effect. The experiments show that our model outperforms the baseline models.