# CHA: Categorical Hierarchy-based Attention for Next POI Recommendation

> Research article (ACM Transactions on Information Systems, 2021) · cited 42× · AI/ML

**Wikidata**: [openalex:W3197907940](https://www.wikidata.org/wiki/openalex:W3197907940)  
**Source**: https://4ort.xyz/entity/cha-categorical-hierarchy-based-attention-for-next-poi-recommendation