Jul 2026
Understanding Semantic IDs: From Item Representation to Item Selection in Generative Recommendation
The results show that SIDs provide useful coarse item organization, but their fine boundaries should not alone determine which items remain available during generation, and propose Item-Supported Decoding (ISD), a lightweight inference-time method that allows a user-specific item ranking to support corresponding SID pr...
Jun-Ting Wang, Xinrui He, Yunzhe Li et al.
· arXiv.org · 2 citations