Author

Xiaoyong Du

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Aug 2026

RaG-Tree: Combining R-Tree and HNSW for Multi-Attribute Range Filtered Approximate Nearest Neighbor Search

RaG-Tree is proposed, a unified index that couples an R-tree with partition-aware HNSW graphs for MR-ANNS and leverages hierarchical R-tree partitions for effective range pruning and adapts the sparsity of each HNSW graph to the local vector distributions within its partition, enabling lightweight indexing and efficien...

Jia-Wei Liu, Xiang Zhang, Chao Zhang et al. · arXiv.org · 0 citations

#artificial intelligence Preprint Sep 2026

EvoOntology: A Self-Evolving Ontology Layer for Data Agents

EvoOntology is introduced, a self-evolving ontology layer for data agents that encapsulates the ontology as an MCP server comprising a schema layer, a content layer, and a tool layer, enabling agents to actively query and interact with the ontology at runtime.

Mei-Duo Chong, Shao-Lei Zhang, Ju Fan et al. · 0 citations