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Knowledge Graph-based Retrieval-Augmented Generation (KG-RAG) significantly enhances the reasoning capabilities of LargeLanguage Models by leveraging structured knowledge. However, existing KG-RAG frameworks typically operate as open-loop…

Information Retrieval · Computer Science 2025-08-14 Xujie Yuan , Shimin Di , Jielong Tang , Libin Zheng , Jian Yin

Current Retrieval-Augmented Generation systems use uniform processing, causing inefficiency as simple queries consume resources similar to complex multi-hop tasks. We present SymRAG, a framework that introduces adaptive query routing via…

Artificial Intelligence · Computer Science 2025-07-15 Safayat Bin Hakim , Muhammad Adil , Alvaro Velasquez , Houbing Herbert Song

This paper presents the Entity-Duet Neural Ranking Model (EDRM), which introduces knowledge graphs to neural search systems. EDRM represents queries and documents by their words and entity annotations. The semantics from knowledge graphs…

Information Retrieval · Computer Science 2018-06-05 Zhenghao Liu , Chenyan Xiong , Maosong Sun , Zhiyuan Liu

Despite the remarkable progress of Large Language Models (LLMs), their performance in question answering (QA) remains limited by the lack of domain-specific and up-to-date knowledge. Retrieval-Augmented Generation (RAG) addresses this…

Information Retrieval · Computer Science 2025-09-17 Yaodong Su , Yixiang Fang , Yingli Zhou , Quanqing Xu , Chuanhui Yang

Multi-hop knowledge graph (KG) reasoning is an effective and explainable method for predicting the target entity via reasoning paths in query answering (QA) task. Most previous methods assume that every relation in KGs has enough training…

Artificial Intelligence · Computer Science 2019-09-02 Xin Lv , Yuxian Gu , Xu Han , Lei Hou , Juanzi Li , Zhiyuan Liu

This paper introduces SemRAG, an enhanced Retrieval Augmented Generation (RAG) framework that efficiently integrates domain-specific knowledge using semantic chunking and knowledge graphs without extensive fine-tuning. Integrating…

Computation and Language · Computer Science 2025-07-30 Kezhen Zhong , Basem Suleiman , Abdelkarim Erradi , Shijing Chen

This study proposed a knowledge graph entity extraction and relationship reasoning algorithm based on a graph neural network, using a graph convolutional network and graph attention network to model the complex structure in the knowledge…

Computation and Language · Computer Science 2024-11-26 Junliang Du , Guiran Liu , Jia Gao , Xiaoxuan Liao , Jiacheng Hu , Linxiao Wu

Entity alignment (EA) plays an important role in automatically integrating knowledge graphs (KGs) from multiple sources. Recent approaches based on Graph Neural Network (GNN) obtain entity representation from relation information and have…

Computation and Language · Computer Science 2021-10-26 Xueyuan Lin , Haihong E , Wenyu Song , Haoran Luo

Retrieval-Augmented Generation (RAG) is widely used to mitigate hallucinations of Large Language Models (LLMs) by leveraging external knowledge. While effective for simple queries, traditional RAG systems struggle with large-scale,…

Computation and Language · Computer Science 2025-11-11 Luyao Zhuang , Shengyuan Chen , Yilin Xiao , Huachi Zhou , Yujing Zhang , Hao Chen , Qinggang Zhang , Xiao Huang

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

Knowledge is captured in the form of entities and their relationships and stored in knowledge graphs. Knowledge graphs enhance the capabilities of applications in many different areas including Web search, recommendation, and natural…

Machine Learning · Computer Science 2021-03-31 Kalpa Gunaratna , Yu Wang , Hongxia Jin

Recent graph-based RAG approaches leverage knowledge graphs by extracting entities from a query to fetch their associated relationships and metadata. However, relying solely on entity extraction often results in the misinterpretation or…

Computation and Language · Computer Science 2026-01-22 Ningyuan Li , Junrui Liu , Yi Shan , Minghui Huang , Ziren Gong , Tong Li

Despite initial successes and a variety of architectures, retrieval-augmented generation systems still struggle to reliably retrieve and connect the multi-step evidence required for complicated reasoning tasks. Most of the standard RAG…

Artificial Intelligence · Computer Science 2026-05-26 Jovan Pavlović , Miklós Krész , László Hajdu

Retrieval-augmented generation (RAG) enables large language models (LLMs) to dynamically access external information, which is powerful for answering questions over previously unseen documents. Nonetheless, they struggle with high-level…

Artificial Intelligence · Computer Science 2026-04-21 Chi-Hsiang Hsiao , Yi-Cheng Wang , Tzung-Sheng Lin , Yi-Ren Yeh , Chu-Song Chen

Retrieval-Augmented Generation (RAG) enhances Large Language Models (LLMs) by grounding responses in external knowledge during inference. However, conventiona RAG systems under-perform on structured tabular data, largely due to coarse…

Computation and Language · Computer Science 2026-05-05 Zebin Guo , Weidong Geng , Ruichen Mao

Graph Retrieval-Augmented Generation (GraphRAG) is dominated by a retrieve-then-reason paradigm, where context is retrieved using heuristics and then reasoned over. Such methods struggle to adapt to the query-specific logic required for…

Information Retrieval · Computer Science 2026-05-20 Larnell Moore , Naihao Deng , Rada Mihalcea , Farnaz Jahanbakhsh

Traditional Retrieval-Augmented Generation (RAG) effectively supports single-hop question answering with large language models but faces significant limitations in multi-hop question answering tasks, which require combining evidence from…

Computation and Language · Computer Science 2026-05-26 Junli Liang , Pengfei Zhou , Wangqiu Zhou , Wenjie Qing , Qi Zhao , Ziwen Wang , Qi Song , Xiangyang Li

Knowledge graphs have emerged as a sophisticated advancement and refinement of semantic networks, and their deployment is one of the critical methodologies in contemporary artificial intelligence. The construction of knowledge graphs is a…

Artificial Intelligence · Computer Science 2024-05-07 Daqian Shi

Multi-hop question answering (QA) necessitates multi-step reasoning and retrieval across interconnected subjects, attributes, and relations. Existing retrieval-augmented generation (RAG) methods struggle to capture these structural…

Computation and Language · Computer Science 2026-02-19 Jimeng Shi , Wei Hu , Runchu Tian , Bowen Jin , Wonbin Kweon , SeongKu Kang , Yunfan Kang , Dingqi Ye , Sizhe Zhou , Shaowen Wang , Jiawei Han

Retrieval-Augmented Generation (RAG) systems enable large language models (LLMs) instant access to relevant information for the generative process, demonstrating their superior performance in addressing common LLM challenges such as…

Computation and Language · Computer Science 2025-10-17 Yilun Zheng , Dan Yang , Jie Li , Lin Shang , Lihui Chen , Jiahao Xu , Sitao Luan