Time-aware Path Reasoning on Knowledge Graph for Recommendation

Abstract

Reasoning on knowledge graph (KG) has been studied for explainable recommendation due to it's ability of providing explicit explanations. However, current KG-based explainable recommendation methods unfortunately ignore the temporal information (such as purchase time, recommend time, etc.), which may result in unsuitable explanations. In this work, we propose a novel Time-aware Path reasoning for Recommendation (TPRec for short) method, which leverages the potential of temporal information to offer better recommendation with plausible explanations. First, we present an efficient time-aware interaction relation extraction component to construct collaborative knowledge graph with time-aware interactions (TCKG for short), and then introduce a novel time-aware path reasoning method for recommendation. We conduct extensive experiments on three real-world datasets. The results demonstrate that the proposed TPRec could successfully employ TCKG to achieve substantial gains and improve the quality of explainable recommendation.

27 pages, ACM Transactions on Information Systems (TOIS), accepted

References in corpus (13)

• BPR: Bayesian Personalized Ranking from Implicit Feedback
• KGAT: Knowledge Graph Attention Network for Recommendation
• Learning Intents behind Interactions with Knowledge Graph for Recommendation
• Reinforcement Knowledge Graph Reasoning for Explainable Recommendation
• Translation-based Recommendation
• SHINE: Signed Heterogeneous Information Network Embedding for Sentiment Link Prediction
• DKN: Deep Knowledge-Aware Network for News Recommendation
• Interactive Path Reasoning on Graph for Conversational Recommendation
• Counterfactual Explainable Recommendation
• DisenKGAT: Knowledge Graph Embedding with Disentangled Graph Attention Network
• Time-aware Path Reasoning on Knowledge Graph for Recommendation
• Discovering Invariant Rationales for Graph Neural Networks
• Learning Heterogeneous Temporal Patterns of User Preference for Timely Recommendation

Cited by in corpus (2)

• Time-aware Path Reasoning on Knowledge Graph for Recommendation
• Attention Is Not the Only Choice: Counterfactual Reasoning for Path-Based Explainable Recommendation