基于预训练语言模型的商品属性抽取

属性抽取是构建知识图谱的关键一环,其目的是从非结构化文本中抽取出与实体相关的属性值.该文将属性抽取转化成序列标注问题,使用远程监督方法对电商相关的多种来源文本进行自动标注,缓解商品属性抽取缺少标注数据的问题.为了对系统性能进行精准评价,构建了人工标注测试集,最终获得面向电商的多领域商品属性抽取标注数据集.基于新构建的数...

Pre-trained Language Models for Product Attribute Extraction

Attribute extraction is a key step of constructing a knowledge graph. In this paper, the task of attribute extraction is converted into a sequence labeling problem. Due to a lack of labeling data in product attribute extraction, we use the distant supervision to automatically label multiple source texts related to e-commerce. In order to accurately evaluate the performance of the system, we construct a manually annotated test set, and finally obtain a new data set for product attribute extraction in multi-domains. Based on the newly constructed data set, we carried out intra-domain and cross-domain attribute extraction for a variety of pre-trained language models. The experimental results show that the pre-trained language models can better improve the extraction performance. Among them, ELECTRA performs the best in attribute extraction in in-domain experiments, and BERT performs the best in cross-domain experiments. we also find that adding a small amount of target domain annotation data can effectively improve the performance cross-domain attribute extraction and enhance the domain adaptability of the model.