Can Persistent Homology provide an efficient alternative for Evaluation of Knowledge Graph Completion Methods?
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In this paper we present a novel method, Knowledge Persistence (𝒦𝒫), for faster evaluation of Knowledge Graph (KG) completion approaches. Current ranking-based evaluation is quadratic in the size of the KG, leading to long evaluation times and consequently a high carbon footprint. 𝒦𝒫 addresses this by representing the topology of the KG completion methods through the lens of topological data analysis, concretely using persistent homology. The characteristics of persistent homology allow 𝒦𝒫 to evaluate the quality of the KG completion looking only at a fraction of the data. Experimental results on standard datasets show that the proposed metric is highly correlated with ranking metrics (Hits@N, MR, MRR). Performance evaluation shows that 𝒦𝒫 is computationally efficient: In some cases, the evaluation time (validation+test) of a KG completion method has been reduced from 18 hours (using Hits@10) to 27 seconds (using 𝒦𝒫), and on average (across methods data) reduces the evaluation time (validation+test) by ≈ 99.96%.
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