Document Search And Retrieval At Scale

via “multi-strategy document search with tree, metadata, semantic, and description-based retrieval”

📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

Unique: Implements four orthogonal search strategies (tree-based, metadata, semantic, description) all operating on the same hierarchical index, allowing composition and fallback mechanisms. Unlike vector-only systems, it provides explicit control over retrieval strategy and can combine multiple approaches for improved recall.

vs others: More flexible than single-strategy vector RAG because it supports metadata and description-based search without requiring separate indices, and allows explicit strategy composition rather than relying solely on embedding similarity.