Document Structure Preservation And Hierarchy Reconstruction

via “markdown document processing with heading-based hierarchy extraction”

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

Unique: Uses Markdown heading hierarchy as the primary structure signal for tree construction, enabling automatic hierarchy extraction from well-formed Markdown without external metadata. Treats heading levels as semantic document structure rather than visual formatting.

vs others: More natural for Markdown documents than generic chunking because it respects heading hierarchy that authors intentionally created, whereas vector RAG systems typically ignore Markdown structure and chunk at fixed token boundaries.