Are Message Passing Neural Networks Really Helpful for Knowledge Graph Completion?

Juanhui Li; Harry Shomer; Jiayuan Ding; Yiqi Wang; Yao Ma; Neil Shah; Jiliang Tang; Dawei Yin

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arXiv · 2205.10652

Are Message Passing Neural Networks Really Helpful for Knowledge Graph Completion?

Juanhui Li·Harry Shomer·Jiayuan Ding·Yiqi Wang·Yao Ma·Neil Shah·Jiliang Tang·Dawei Yin

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Abstract

Knowledge graphs (KGs) facilitate a wide variety of applications. Despite great efforts in creation and maintenance, even the largest KGs are far from complete. Hence, KG completion (KGC) has become one of the most crucial tasks for KG research. Recently, considerable literature in this space has centered around the use of Message Passing (Graph) Neural Networks (MPNNs), to learn powerful embeddings. The success of these methods is naturally attributed to the use of MPNNs over simpler multi-layer perceptron (MLP) models, given their additional message passing (MP) component. In this work, we find that surprisingly, simple MLP models are able to achieve comparable performance to MPNNs, suggesting that MP may not be as crucial as previously believed. With further exploration, we show careful scoring function and loss function design has a much stronger influence on KGC model performance. This suggests a conflation of scoring function design, loss function design, and MP in prior work, with promising insights regarding the scalability of state-of-the-art KGC methods today, as well as careful attention to more suitable MP designs for KGC tasks tomorrow. Our codes are publicly available at: https://github.com/Juanhui28/Are_MPNNs_helpful.

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Juanhui Li, Harry Shomer, Jiayuan Ding, Yiqi Wang, Yao Ma, Neil Shah, Jiliang Tang, Dawei Yin. 2023-07-04. Are Message Passing Neural Networks Really Helpful for Knowledge Graph Completion?. https://arxiv.org/abs/2205.10652

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