RecKG: Knowledge Graph for Recommender Systems

TL;DR

RecKG introduces a standardized knowledge graph designed to unify heterogeneous data across recommender systems, enhancing data integration and semantic discovery, validated through application and qualitative evaluation.

Contribution

This paper presents RecKG, a novel standardized knowledge graph that enables seamless integration of diverse recommender system datasets and improves interoperability.

Findings

RecKG effectively standardizes heterogeneous datasets.

RecKG enhances semantic information discovery.

RecKG demonstrates interoperability through qualitative evaluation.

Abstract

Knowledge graphs have proven successful in integrating heterogeneous data across various domains. However, there remains a noticeable dearth of research on their seamless integration among heterogeneous recommender systems, despite knowledge graph-based recommender systems garnering extensive research attention. This study aims to fill this gap by proposing RecKG, a standardized knowledge graph for recommender systems. RecKG ensures the consistent representation of entities across different datasets, accommodating diverse attribute types for effective data integration. Through a meticulous examination of various recommender system datasets, we select attributes for RecKG, ensuring standardized formatting through consistent naming conventions. By these characteristics, RecKG can seamlessly integrate heterogeneous data sources, enabling the discovery of additional semantic information within the integrated knowledge graph. We apply RecKG to standardize real-world datasets, subsequently developing an application for RecKG using a graph database. Finally, we validate RecKG's achievement in interoperability through a qualitative evaluation between RecKG and other studies.