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Chunking is a crucial preprocessing step in retrieval-augmented generation (RAG) systems, significantly impacting retrieval effectiveness across diverse datasets. In this study, we systematically evaluate fixed-size chunking strategies and…

Information Retrieval · Computer Science 2025-05-30 Sinchana Ramakanth Bhat , Max Rudat , Jannis Spiekermann , Nicolas Flores-Herr

Chunking quality determines RAG system performance. Current methods partition documents individually, but complex queries need information scattered across multiple sources: the knowledge fragmentation problem. We introduce Cross-Document…

Information Retrieval · Computer Science 2026-01-12 Mile Stankovic

Retrieval-Augmented Generation (RAG) struggles on long, structured financial filings where relevant evidence is sparse and cross-referenced. This paper presents a systematic investigation of advanced metadata-driven Retrieval-Augmented…

Information Retrieval · Computer Science 2025-10-29 Michail Dadopoulos , Anestis Ladas , Stratos Moschidis , Ioannis Negkakis

Retrieval-Augmented Generation (RAG) systems are increasingly vital for navigating the ever-expanding body of scientific literature, particularly in high-stakes domains such as chemistry. Despite the promise of RAG, foundational design…

Information Retrieval · Computer Science 2025-06-24 Mahmoud Amiri , Thomas Bocklitz

Retrieval-Augmented Generation (RAG) systems depend critically on document chunking quality for retrieving relevant context. Fixed chunking segments documents into uniform units irrespective of semantics or user intent, producing a…

Computation and Language · Computer Science 2026-05-27 Mudit Rastogi

Retrieval-Augmented Generation (RAG) has become a widely adopted paradigm for enhancing the reliability of large language models (LLMs). However, RAG systems are sensitive to retrieval strategies that rely on text chunking to construct…

Information Retrieval · Computer Science 2026-03-31 Sun Xu , Tongkai Xu , Baiheng Xie , Li Huang , Qiang Gao , Kunpeng Zhang

The performance of Retrieval-Augmented Generation (RAG) systems in information retrieval is significantly influenced by the characteristics of the documents being processed. In this study, the structured nature of textbooks, the conciseness…

Information Retrieval · Computer Science 2024-09-23 Esmaeil Narimissa , David Raithel

Enterprise retrieval augmented generation (RAG) offers a highly flexible framework for combining powerful large language models (LLMs) with internal, possibly temporally changing, documents. In RAG, documents are first chunked. Relevant…

Computation and Language · Computer Science 2024-09-02 Vatsal Raina , Mark Gales

Retrieval-Augmented Generation (RAG) is a promising approach to mitigate hallucinations in Large Language Models (LLMs) for legal applications, but its reliability is critically dependent on the accuracy of the retrieval step. This is…

Computation and Language · Computer Science 2025-10-09 Markus Reuter , Tobias Lingenberg , Rūta Liepiņa , Francesca Lagioia , Marco Lippi , Giovanni Sartor , Andrea Passerini , Burcu Sayin

We present the first large-scale, cross-domain evaluation of document chunking strategies for dense retrieval, addressing a critical but underexplored aspect of retrieval-augmented systems. In our study, 36 segmentation methods spanning…

Computation and Language · Computer Science 2026-03-10 Muhammad Arslan Shaukat , Muntasir Adnan , Carlos C. N. Kuhn

The effectiveness of Large Language Models (LLMs) in generating accurate responses relies heavily on the quality of input provided, particularly when employing Retrieval Augmented Generation (RAG) techniques. RAG enhances LLMs by sourcing…

Information Retrieval · Computer Science 2024-08-02 Spurthi Setty , Harsh Thakkar , Alyssa Lee , Eden Chung , Natan Vidra

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by integrating external knowledge sources to address their limitations in accessing up-to-date or specialized information. A natural strategy to increase the…

Computation and Language · Computer Science 2025-11-10 Song Wang , Zihan Chen , Peng Wang , Zhepei Wei , Zhen Tan , Yu Meng , Cong Shen , Jundong Li

Graph-based retrieval-augmented generation (RAG) enriches large language models (LLMs) with external knowledge for long-context understanding and multi-hop reasoning, but existing methods face a granularity dilemma: fine-grained…

Computation and Language · Computer Science 2025-09-26 Yaxiong Wu , Jianyuan Bo , Yongyue Zhang , Sheng Liang , Yong Liu

The effectiveness upper bound of retrieval-augmented generation (RAG) is fundamentally constrained by the semantic integrity and information granularity of text chunks in its knowledge base. To address these challenges, this paper proposes…

Computation and Language · Computer Science 2026-03-13 Jihao Zhao , Daixuan Li , Pengfei Li , Shuaishuai Zu , Biao Qin , Hongyan Liu

Retrieval Augmented Generation (RAG) provides the necessary informational grounding to LLMs in the form of chunks retrieved from a vector database or through web search. RAG could also use knowledge graph triples as a means of providing…

Information Retrieval · Computer Science 2026-03-31 Shalin Shah , Srikanth Ryali , Ramasubbu Venkatesh

Retrieval-augmented generation (RAG) has strong potential for producing accurate and factual outputs by combining language models (LMs) with evidence retrieved from large text corpora. However, current pipelines are limited by static…

Information Retrieval · Computer Science 2026-02-27 Xuechen Zhang , Koustava Goswami , Samet Oymak , Jiasi Chen , Nedim Lipka

\Ac{RAG} has emerged as a crucial technique for enhancing large models with real-time and domain-specific knowledge. While numerous improvements and open-source tools have been proposed to refine the \ac{RAG} framework for accuracy,…

Information Retrieval · Computer Science 2025-02-20 Yixing Fan , Qiang Yan , Wenshan Wang , Jiafeng Guo , Ruqing Zhang , Xueqi Cheng

While Retrieval-Augmented Generation (RAG) has emerged as a promising paradigm for boosting large language models (LLMs) in knowledge-intensive tasks, it often overlooks the crucial aspect of text chunking within its workflow. This paper…

Computation and Language · Computer Science 2025-05-22 Jihao Zhao , Zhiyuan Ji , Yuchen Feng , Pengnian Qi , Simin Niu , Bo Tang , Feiyu Xiong , Zhiyu Li

Retrieval-Augmented Generation (RAG) systems lose retrieval accuracy when similar documents coexist in the vector database, causing unnecessary information, hallucinations, and factual errors. To alleviate this issue, we propose CHOP, a…

Computation and Language · Computer Science 2026-04-20 Hyunseok Park , Jihyeon Kim , Jongeun Kim , Dongsik Yoon

Retrieval-Augmented Generation (RAG) encounters efficiency challenges when scaling to massive knowledge bases while preserving contextual relevance. We propose Hash-RAG, a framework that integrates deep hashing techniques with systematic…

Information Retrieval · Computer Science 2025-06-04 Jinyu Guo , Xunlei Chen , Qiyang Xia , Zhaokun Wang , Jie Ou , Libo Qin , Shunyu Yao , Wenhong Tian