Type-aware Embeddings for Multi-Hop Reasoning over Knowledge Graphs

Type-aware Embeddings for Multi-Hop Reasoning over Knowledge Graphs

Zhiwei Hu, Victor Gutierrez Basulto, Zhiliang Xiang, Xiaoli Li, Ru Li, Jeff Z. Pan

Proceedings of the Thirty-First International Joint Conference on Artificial Intelligence
Main Track. Pages 3078-3084. https://doi.org/10.24963/ijcai.2022/427

Multi-hop reasoning over real-life knowledge graphs (KGs) is a highly challenging problem as traditional subgraph matching methods are not capable to deal with noise and missing information. Recently, to address this problem a promising approach based on jointly embedding logical queries and KGs into a low-dimensional space to identify answer entities has emerged. However, existing proposals ignore critical semantic knowledge inherently available in KGs, such as type information. To leverage type information, we propose a novel type-aware model, TypE-aware Message Passing (TEMP), which enhances the entity and relation representation in queries, and simultaneously improves generalization, and deductive and inductive reasoning. Remarkably, TEMP is a plug-and-play model that can be easily incorporated into existing embedding-based models to improve their performance. Extensive experiments on three real-world datasets demonstrate TEMP’s effectiveness.
Keywords:
Machine Learning: Knowledge Aided Learning
Knowledge Representation and Reasoning: Reasoning about Knowledge and Belief