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Large Language Models (LLMs) have recently emerged as a powerful backbone for recommender systems. Existing LLM-based recommender systems take two different approaches for representing items in natural language, i.e., Attribute-based…

Information Retrieval · Computer Science 2026-03-03 Kibum Kim , Sein Kim , Hongseok Kang , Jiwan Kim , Heewoong Noh , Yeonjun In , Kanghoon Yoon , Jinoh Oh , Julian McAuley , Chanyoung Park

Generative recommendation systems have gained increasing attention as an innovative approach that directly generates item identifiers for recommendation tasks. Despite their potential, a major challenge is the effective construction of item…

Information Retrieval · Computer Science 2025-06-05 Enze Liu , Bowen Zheng , Cheng Ling , Lantao Hu , Han Li , Wayne Xin Zhao

Large Language Models (LLMs) have been integrated into recommendation systems to enhance user behavior comprehension. The Retrieval Augmented Generation (RAG) technique is further incorporated into these systems to retrieve more relevant…

Information Retrieval · Computer Science 2025-02-12 Jian Xu , Sichun Luo , Xiangyu Chen , Haoming Huang , Hanxu Hou , Linqi Song

Generative recommendation has recently emerged as a powerful paradigm that unifies retrieval and generation, representing items as discrete semantic tokens and enabling flexible sequence modeling with autoregressive models. Despite its…

Computation and Language · Computer Science 2025-11-27 Zheng Hui , Xiaokai Wei , Reza Shirkavand , Chen Wang , Weizhi Zhang , Alejandro Peláez , Michelle Gong

Generative recommendation autoregressively generates item identifiers to recommend potential items. Existing methods typically adopt a one-to-one mapping strategy, where each item is represented by a single identifier. However, this scheme…

Information Retrieval · Computer Science 2025-05-27 Bowen Zheng , Enze Liu , Zhongfu Chen , Zhongrui Ma , Yue Wang , Wayne Xin Zhao , Ji-Rong Wen

Large Language Models (LLMs) have demonstrated strong potential for generative recommendation by leveraging rich semantic knowledge. However, existing LLM-based recommender systems struggle to effectively incorporate collaborative filtering…

Information Retrieval · Computer Science 2026-01-27 Fake Lin , Binbin Hu , Zhi Zheng , Xi Zhu , Ziqi Liu , Zhiqiang Zhang , Jun Zhou , Tong Xu

Talent recruitment is a critical, yet costly process for many industries, with high recruitment costs and long hiring cycles. Existing talent recommendation systems increasingly adopt large language models (LLMs) due to their remarkable…

Computation and Language · Computer Science 2026-04-03 Silin Du , Hongyan Liu

Generative recommendation is emerging as a transformative paradigm by directly generating recommended items, rather than relying on matching. Building such a system typically involves two key components: (1) optimizing the tokenizer to…

Information Retrieval · Computer Science 2026-04-17 Yimeng Bai , Chang Liu , Yang Zhang , Dingxian Wang , Frank Yang , Andrew Rabinovich , Wenge Rong , Fuli Feng

Generative recommendation reformulates recommendation as next-token prediction over discrete semantic identifiers (IDs). A fundamental yet unexplored design choice is that existing methods employ fixed-length tokenization for all items,…

Machine Learning · Computer Science 2026-05-19 Minhao Wang , Bowen Wu , Wei Zhang

Recommender systems serve as foundational infrastructure in modern information ecosystems, helping users navigate digital content and discover items aligned with their preferences. At their core, recommender systems address a fundamental…

Information Retrieval · Computer Science 2026-05-12 Min Hou , Le Wu , Yuxin Liao , Yonghui Yang , Zhen Zhang , Yu Wang , Changlong Zheng , Han Wu , Richang Hong

High-quality representations are a core requirement for effective recommendation. In this work, we study the problem of LLM-based descriptor generation, i.e., keyphrase-like natural language item representation generation frameworks with…

Characterizing users and items through vector representations is crucial for various tasks in recommender systems. Recent approaches attempt to apply Large Language Models (LLMs) in recommendation through a question and answer format, where…

Information Retrieval · Computer Science 2024-06-13 Ting-Ji Huang , Jia-Qi Yang , Chunxu Shen , Kai-Qi Liu , De-Chuan Zhan , Han-Jia Ye

Large Language Models (LLMs) have shown strong potential in generating natural language explanations for recommender systems. However, existing methods often overlook the sequential dynamics of user behavior and rely on evaluation metrics…

Information Retrieval · Computer Science 2026-03-26 Gangyi Zhang , Runzhe Teng , Chongming Gao

Transforming unstructured text into structured data is a complex task, requiring semantic understanding, reasoning, and structural comprehension. While Large Language Models (LLMs) offer potential, they often struggle with handling…

Computation and Language · Computer Science 2025-08-13 Rajmohan C , Sarthak Harne , Arvind Agarwal

Modern commercial platforms typically offer both search and recommendation functionalities to serve diverse user needs, making joint modeling of these tasks an appealing direction. While prior work has shown that integrating search and…

Information Retrieval · Computer Science 2025-04-11 Teng Shi , Jun Xu , Xiao Zhang , Xiaoxue Zang , Kai Zheng , Yang Song , Enyun Yu

Explainable recommender systems are designed to elucidate the explanation behind each recommendation, enabling users to comprehend the underlying logic. Previous works perform rating prediction and explanation generation in a multi-task…

Information Retrieval · Computer Science 2025-04-09 Shijie Liu , Ruixing Ding , Weihai Lu , Jun Wang , Mo Yu , Xiaoming Shi , Wei Zhang

Generative recommendation (GR) models generate items by autoregressively producing a sequence of discrete tokens that jointly index the target item. However, this autoregressive generation process also induces a structured decoding space…

Information Retrieval · Computer Science 2026-05-08 Yupeng Hou , Haven Kim , Clark Mingxuan Ju , Eduardo Escoto , Neil Shah , Julian McAuley

Cross-domain recommendation (CDR) is crucial for improving recommendation accuracy and generalization, yet traditional methods are often hindered by the reliance on shared user/item IDs, which are unavailable in most real-world scenarios.…

Information Retrieval · Computer Science 2025-11-18 Peiyu Hu , Wayne Lu , Jia Wang

With the rise of generative paradigms, generative recommendation has garnered increasing attention. The core component is the item code, generally derived by quantizing collaborative or semantic representations to serve as candidate items…

Information Retrieval · Computer Science 2025-12-16 Longtao Xiao , Haozhao Wang , Cheng Wang , Linfei Ji , Yifan Wang , Jieming Zhu , Zhenhua Dong , Rui Zhang , Ruixuan Li

Integrating product catalogs and user behavior into LLMs can enhance recommendations with broad world knowledge, but the scale of real-world item catalogs, often containing millions of discrete item identifiers (Item IDs), poses a…

Information Retrieval · Computer Science 2025-09-05 Anushya Subbiah , Vikram Aggarwal , James Pine , Steffen Rendle , Krishna Sayana , Kun Su