Taming Pretrained Transformers for Extreme Multi-label Text Classification

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Authors Inderjit Dhillon, Hsiang-Fu Yu, Wei-Cheng Chang, Kai Zhong, Yiming Yang
Journal/Conference Name Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
Paper Category
Paper Abstract We consider the extreme multi-label text classification (XMC) problem given an input text, return the most relevant labels from a large label collection. For example, the input text could be a product description on Amazon.com and the labels could be product categories. XMC is an important yet challenging problem in the NLP community. Recently, deep pretrained transformer models have achieved state-of-the-art performance on many NLP tasks including sentence classification, albeit with small label sets. However, naively applying deep transformer models to the XMC problem leads to sub-optimal performance due to the large output space and the label sparsity issue. In this paper, we propose X-Transformer, the first scalable approach to fine-tuning deep transformer models for the XMC problem. The proposed method achieves new state-of-the-art results on four XMC benchmark datasets. In particular, on a Wiki dataset with around 0.5 million labels, the prec@1 of X-Transformer is 77.28%, a substantial improvement over state-of-the-art XMC approaches Parabel (linear) and AttentionXML (neural), which achieve 68.70% and 76.95% precision@1, respectively. We further apply X-Transformer to a product2query dataset from Amazon and gained 10.7% relative improvement on prec@1 over Parabel.
Date of publication 2019
Code Programming Language C++

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