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Building Data-Driven Applications with LlamaIndex

You're reading from   Building Data-Driven Applications with LlamaIndex A practical guide to retrieval-augmented generation (RAG) to enhance LLM applications

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Product type Paperback
Published in May 2024
Publisher Packt
ISBN-13 9781835089507
Length 368 pages
Edition 1st Edition
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Author (1):
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Andrei Gheorghiu Andrei Gheorghiu
Author Profile Icon Andrei Gheorghiu
Andrei Gheorghiu
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Table of Contents (18) Chapters Close

Preface 1. Part 1:Introduction to Generative AI and LlamaIndex
2. Chapter 1: Understanding Large Language Models FREE CHAPTER 3. Chapter 2: LlamaIndex: The Hidden Jewel - An Introduction to the LlamaIndex Ecosystem 4. Part 2: Starting Your First LlamaIndex Project
5. Chapter 3: Kickstarting Your Journey with LlamaIndex 6. Chapter 4: Ingesting Data into Our RAG Workflow 7. Chapter 5: Indexing with LlamaIndex 8. Part 3: Retrieving and Working with Indexed Data
9. Chapter 6: Querying Our Data, Part 1 – Context Retrieval 10. Chapter 7: Querying Our Data, Part 2 – Postprocessing and Response Synthesis 11. Chapter 8: Building Chatbots and Agents with LlamaIndex 12. Part 4: Customization, Prompt Engineering, and Final Words
13. Chapter 9: Customizing and Deploying Our LlamaIndex Project 14. Chapter 10: Prompt Engineering Guidelines and Best Practices 15. Chapter 11: Conclusion and Additional Resources 16. Index 17. Other Books You May Enjoy

Handling documents that contain a mix of text and tabular data

Data is not always simple. Many real-world documents, such as research papers, financial reports, and others, contain a mix of unstructured text, as well as structured tabular data in tables. Ingesting such heterogeneous documents presents an additional challenge - we need to not only extract text but also identify, parse, and process tables embedded within the text. Because, sometimes you get tables, sometimes you get text and sometimes you have to deal with a mix of both.

LlamaIndex provides UnstructuredElementNodeParser to tackle such documents containing both free-form text as well as tables and other structured elements. It leverages the Unstructured library to analyze the document layout and delineate text sections from tables.

This parser works exclusively on HTML files and can extract two types of nodes:

  • Text nodes: Containing the text chunks
  • Table nodes: Containing the table data and metadata...
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