A unified structure learning framework for graph attention networks

• A unified graph structure learning framework for GNNs. • A novel attention mechanism based on feature and structure proximity. • Experiments demonstrate the superiority of our SLGAT and SLAGNN. Graph Neural Networks (GNNs) have achieved state-of-the-art performance in many fields and attracted a lot of attention in the communit. Most Graph Neural Networks can be merely used when graph-structured data is available. However, many graph structures have noise, or data itself has no graph structures, so learning the dynamic and adaptive graph structures is necessary. In this paper, we propose a unified structure learning framework for Graph Attention Networks. Specifically, we first design a strategy to learn the graph structures. Then we develop a novel attention mechanism based on structure context information of graph and node representations. Further, we devise Structure Learning Graph Attention Networks (SLGAT) and Structure Learning Attention-based Graph Neural Networks (SLAGNN) by using the new attention mechanism on the new graph. Finally, we demonstrate that our approaches outperform competing methods on six standard datasets for the semi-supervised node classification task.