GraphRAG is an advanced structured retrieval-augmented generation (RAG) method that uses knowledge graphs to improve the reasoning capabilities and answer accuracy of large language models (LLMs), particularly suited for querying proprietary data within enterprises.
Natural language interfaces with knowledge graphs are becoming increasingly popular. This trend will continue and transform the way we interact with computer systems. Natural Language Query (NLQ) is a significant step toward this direction, with many businesses eager to query their data using natural language.
Using off-the-shelf large language models (LLMs) for enterprise Q&A applications has limited effectiveness because they lack proprietary knowledge about business activities. GraphRAG provides an ideal solution by allowing customization of LLMs according to specific needs.
Retrieval-augmented generation (RAG) is a method for enhancing existing LLMs with additional external knowledge relevant to the query. It involves a retrieval component that fetches extra information from external sources (referred to as “base context”), which is then fed into LLM prompts to answer questions with higher accuracy.
Besides Q&A, RAG can be used for various natural language processing tasks such as information extraction, recommendation systems, sentiment analysis, and summarization.
To implement GraphRAG for Q&A, you need to choose which information to send to the LLM. This is typically based on querying a database according to the user’s query intent. Vector databases are well-suited for this purpose as they capture latent semantics, syntactic structures, and relationships between items through embeddings.
The basic implementation is straightforward but requires addressing the following challenges:
GraphRAG is an enhancement of the popular RAG method. It uses graph databases as a source of contextual information for LLMs, combining entity descriptions and their attributes and relationships to provide deeper insights. Here are a few variants of GraphRAG:
You can design your own GraphRAG as long as you meet the requirements shown in the diagram.
Graph Databases: (The following graph databases are ones the author has used)
GraphRAG represents a significant advancement in LLM enhancement. By effectively combining the strengths of retrieval and generation methods, GraphRAG improves the ability of LLMs to provide accurate, relevant, and contextually rich answers. This technology not only improves the overall quality of outputs but also expands the LLM’s capacity to handle complex and nuanced questions. GraphRAG opens new possibilities across various applications, from advanced chatbots to complex data analysis tools, marking an important development in the field of natural language processing.
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