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cloud.google.com·6h ago
Data Science
Towards Data Science·Aug 5·5 min read
Building Document Structure with Loop Engineering: Recovering a PDF’s Outline from Body Typography for RAG
TL;DR
A novel approach using loop engineering recovers a PDF's outline by analyzing body typography, enhancing document structure for retrieval-augmented generation (RAG) systems.
✦ Why It Matters
Implement loop engineering techniques to enhance your document processing systems today.
Key Takeaways
- Utilize typography signals to identify headings in PDFs.
- Implement the new TOC reconstruction method for better document parsing.
- Achieve high recall rates for real headings in document processing.
- Adapt the method for composite documents with multiple outlines.
How It Works
The method analyzes the typography of PDF body text to identify headings based on six signals: font size ratio, boldness, numeric prefixes, short length, left alignment, and blank lines above. Each signal contributes to a score that determines the likelihood of a line being a heading.
A final validation step uses a language model to refine the list of detected headings.