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Building Neo4j-Powered Applications with LLMs
Building Neo4j-Powered Applications with LLMs

Building Neo4j-Powered Applications with LLMs: Create LLM-driven search and recommendations applications with Haystack, LangChain4j, and Spring AI

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Profile Icon Ravindranatha Anthapu Profile Icon Siddhant Agarwal
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Mex$737.99 Mex$922.99
Paperback Jun 2025 312 pages 1st Edition
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Arrow left icon
Profile Icon Ravindranatha Anthapu Profile Icon Siddhant Agarwal
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Mex$737.99 Mex$922.99
Paperback Jun 2025 312 pages 1st Edition
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Mex$737.99 Mex$922.99
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Renews at $19.99p/m
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Building Neo4j-Powered Applications with LLMs

Introducing LLMs, RAGs, and Neo4j Knowledge Graphs

Artificial Intelligence (AI) is evolving beyond niche and specialized fields to become more accessible and able to assist with day-to-day tasks. One of the best examples is the explosive advent of Generative AI (GenAI). In the last few years, GenAI has created a lot of excitement both for technology builders and regular users with its ease of use and ability to understand and answer questions the way humans can. The breakthroughs in Large Language Models (LLMs) have propelled GenAI to the forefront. This has opened up a lot of opportunities for businesses to change how they interact with their customers. Customers can ask a question in natural language and get an answer without needing a human to be available to understand the question or understand the data to extract intelligence from it. While GenAI has taken big strides in different fields with different modalities, such as text, audio, and video, our focus throughout this book...

Outlining the evolution of GenAI through the lens of LLMs

In late 2022, OpenAI took the world by storm by releasing an AI engine called ChatGPT that could understand language like humans and interact with users in natural language. This was the best representation of GenAI in a long time. AI concepts started as rules-based systems and evolved into machine learning algorithms in the ‘90s. With the rise of deep learning and LLMs, the concept of GenAI became more popular. These AI systems could generate new content after being trained using existing content. OpenAI’s GPT-3 LLM model was one of the first LLMs that captured the interest of the masses. GenAI can be used to get answers in a manner that feels like human interaction and it can also be used to generate images by providing a text description, describe an image as text content, generate videos using text content, and many other things. It can enhance creativity, accelerate research and development, enable a simple...

Understanding the importance of RAGs and knowledge graphs in LLMs

To address the pitfalls of GenAI, we can either fine-tune the model or ground the responses using other sources.

Fine-tuning involves training an existing model with additional information, which can result in high-quality responses. But this can be a complex and time-consuming process.

The RAG approach involves providing extra information when we are asking the LLM a question.

With this approach, you can integrate knowledge repositories into the generative process. In this scenario, LLM can leverage the extra information retrieved from other sources and tune the response to match the information provided, thus grounding the results.

These repositories and sources can include the following:

  • Publicly available structured datasets (e.g., scientific databases such as PubMed or publicly accessible encyclopedic resources such as Wikipedia)
  • Enterprise knowledge bases (e.g., internal company...

Introducing Neo4j knowledge graphs

A knowledge graph is dynamic and continues to evolve based on how data and relationships within the data evolve with time.

Neo4j is a database that excels with its ability to store data in graphs. For example, in a store, most products are laid out in a certain grouping and stay in those groups. But there is an exception to this arrangement. When a store wants to promote some products, they are placed at the front of the store. This kind of flexible thought process should be adapted for our knowledge graph implementation. As the semantics of data evolves the knowledge graph should be able to capture this change.

Neo4j, with its multiple labels for nodes and its optional schema approach, makes it easy to keep our graph relevant by helping us to persist (retain) our understanding of data as an extra label on the node, or a specific relationship that provides more relevant context between the nodes. We will take a deeper look at how we can...

Summary

In this chapter, we discussed the evolution of GenAI in the context of LLMs. We also looked at how RAG and knowledge graphs are key enablers of this transformation and help provide structure and context, improving an LLM’s accuracy and reasoning.

Looking ahead, the next chapter dives deep into RAG — a technique that significantly enhances GenAI’s accuracy by grounding responses in retrieved, verified information.

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Key benefits

  • Design vector search and recommendation systems with LLMs using Neo4j GenAI, Haystack, Spring AI, and LangChain4j
  • Apply best practices for graph exploration, modeling, reasoning, and performance optimization
  • Build and consume Neo4j knowledge graphs and deploy your GenAI apps to Google Cloud
  • Purchase of the print or Kindle book includes a free PDF eBook

Description

Embark on an expert-led journey into building LLM-powered applications using Retrieval-Augmented Generation (RAG) and Neo4j knowledge graphs. Written by Ravindranatha Anthapu, Principal Consultant at Neo4j, and Siddhant Agrawal, a Google Developer Expert in GenAI, this comprehensive guide is your starting point for exploring alternatives to LangChain, covering frameworks such as Haystack, Spring AI, and LangChain4j. As LLMs (large language models) reshape how businesses interact with customers, this book helps you develop intelligent applications using RAG architecture and knowledge graphs, with a strong focus on overcoming one of AI’s most persistent challenges—mitigating hallucinations. You'll learn how to model and construct Neo4j knowledge graphs with Cypher to enhance the accuracy and relevance of LLM responses. Through real-world use cases like vector-powered search and personalized recommendations, the authors help you build hands-on experience with Neo4j GenAI integrations across Haystack and Spring AI. With access to a companion GitHub repository, you’ll work through code-heavy examples to confidently build and deploy GenAI apps on Google Cloud. By the end of this book, you’ll have the skills to ground LLMs with RAG and Neo4j, optimize graph performance, and strategically select the right cloud platform for your GenAI applications.

Who is this book for?

This LLM book is for database developers and data scientists who want to leverage knowledge graphs with Neo4j and its vector search capabilities to build intelligent search and recommendation systems. Working knowledge of Python and Java is essential to follow along. Familiarity with Neo4j, the Cypher query language, and fundamental concepts of databases will come in handy.

What you will learn

  • Design, populate, and integrate a Neo4j knowledge graph with RAG
  • Model data for knowledge graphs
  • Integrate AI-powered search to enhance knowledge exploration
  • Maintain and monitor your AI search application with Haystack
  • Use LangChain4j and Spring AI for recommendations and personalization
  • Seamlessly deploy your applications to Google Cloud Platform
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Length: 312 pages
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Language : English
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Table of Contents

19 Chapters
Part: 1 Introducing RAG and Knowledge Graphs for LLM Grounding Chevron down icon Chevron up icon
Introducing LLMs, RAGs, and Neo4j Knowledge Graphs Chevron down icon Chevron up icon
Demystifying RAG Chevron down icon Chevron up icon
Building a Foundational Understanding of Knowledge Graph for Intelligent Applications Chevron down icon Chevron up icon
Part 2: Integrating Haystack with Neo4j: A Practical Guide to Building AI-Powered Search Chevron down icon Chevron up icon
Building Your Neo4j Graph with Movies Dataset Chevron down icon Chevron up icon
Implementing Powerful Search Functionalities with Neo4j and Haystack Chevron down icon Chevron up icon
Exploring Advanced Knowledge Graph Capabilities with Neo4j Chevron down icon Chevron up icon
Part 3: Building an Intelligent Recommendation System with Neo4j, Spring AI, and LangChain4j Chevron down icon Chevron up icon
Introducing the Neo4j Spring AI and LangChain4j Frameworks for Building Recommendation Systems Chevron down icon Chevron up icon
Constructing a Recommendation Graph with H&M Personalization Dataset Chevron down icon Chevron up icon
Integrating LangChain4j and Spring AI with Neo4j Chevron down icon Chevron up icon
Creating an Intelligent Recommendation System Chevron down icon Chevron up icon
Part 4: Deploying Your GenAI Application in the Cloud Chevron down icon Chevron up icon
Choosing the Right Cloud Platform for GenAI Applications Chevron down icon Chevron up icon
Deploying Your Application on the Google Cloud Chevron down icon Chevron up icon
Epilogue Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon
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