PaperAgent

Dec 12, 2025 · Artificial Intelligence

How BookRAG Redefines Long-Document Retrieval with Hierarchical Indexing

BookRAG introduces a hierarchical, structure‑aware indexing method that combines tree‑based document representation with graph‑based entity linking and an agent‑driven retrieval pipeline, achieving up to 71.2% recall improvement on multimodal long‑document benchmarks while cutting token usage and latency dramatically.