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Author

Alejandro Ariza-Casabona

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Book Open access Sep 2026

Assessing Sentiment Semantics in KG-Based Explainable Recommender Systems

Sentiment information can enhance path-based explainable recommendation, yet advances are hindered by the lack of public benchmarks for sentiment-aware knowledge graph (SAKG) reasoning. We address this gap by systematically evaluating how different sentiment representation strategies and reward mechanisms affect utilit...

Alejandro Ariza-Casabona, Pol Pastells, Ludovico Boratto et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Neither Black nor White: Balancing Semantic and Collaborative Signals with Graph-Informed Semantic IDs (GrIS)

Existing work on Semantic IDs (SIDs) for generative recommendation treats SID construction as a representation learning problem: encode items into a quantised latent space and read off codes. We argue this view is incidental. SID construction is, at heart, a recursive clustering problem, and once stated this way the na...

A. Medvedev, Alejandro Ariza-Casabona, Steven Derby et al. · 0 citations

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