These are graph-centric types of RAG:
NodeRAG -> https://huggingface.co/papers/2504.11544
Uses well-designed heterogeneous graph structures and focuses on graph design to ensure smooth integration of graph algorithms. It outperforms GraphRAG and LightRAG on multi-hop and open-ended QA benchmarksHeteRAG -> https://huggingface.co/papers/2504.10529
This heterogeneous RAG framework decouples knowledge chunk representations. It uses multi-granular views for retrieval and concise chunks for generation, along with adaptive prompt tuningHyper-RAG -> https://huggingface.co/papers/2504.08758
A hypergraph-based RAG method. By capturing both pairwise and complex relationships in domain-specific knowledge, it improves factual accuracy and reduces hallucinations, especially in high-stakes fields like medicine, surpassing Graph RAG and Light RAG. Its lightweight version also doubles retrieval speed