DIGAT: Modeling News Recommendation with Dual-Graph Interaction
Zhiming Mao, Jian Li, Hongru Wang, Xingshan Zeng, Kam‐Fai Wong · 2022
News recommendation (NR) is essential for online news services.Existing NR methods typically adopt a news-user representation learning framework, facing two potential limitations.First, in news encoder, single candidate news encoding suffers from an insufficient semantic information problem.Second, existing graphbased NR methods are promising but lack effective news-user feature interaction, rendering the graph-based recommendation suboptimal.To overcome these limitations, we propose dualinteractive graph attention networks (DIGAT) consisting of news-and user-graph channels.In the news-graph channel, we enrich the semantics of single candidate news by incorporating the semantically relevant news information with a semantic-augmented graph (SAG).In the user-graph channel, multi-level user interests are represented with a news-topic graph.Most notably, we design a dual-graph interaction process to perform effective feature interaction between the news and user graphs, which facilitates accurate news-user representation matching.Experiment results on the benchmark dataset MIND show that DIGAT outperforms existing news recommendation methods 1 .Further ablation studies and analyses validate the effectiveness of (i) semantic-augmented news graph modeling and (ii) dual-graph interaction.