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Java One
Java One
Mar 28, 2026 · Artificial Intelligence

Building a Vector‑Free RAG System with Hierarchical Page Indexing

This guide explains how to create a retrieval‑augmented generation (RAG) system that avoids embeddings by converting documents into a hierarchical tree, using an LLM to navigate, summarize, and retrieve answers, complete with a full Python implementation and a GitHub repository.

Hierarchical IndexingLLMPython
0 likes · 15 min read
Building a Vector‑Free RAG System with Hierarchical Page Indexing
PaperAgent
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.

Agent RetrievalHierarchical IndexingLLM
0 likes · 7 min read
How BookRAG Redefines Long-Document Retrieval with Hierarchical Indexing