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Revisiting Chunking in the RAG Pipeline
Latest   Machine Learning

Revisiting Chunking in the RAG Pipeline

Last Updated on September 19, 2024 by Editorial Team

Author(s): Florian June

Originally published on Towards AI.

Unveiling the Cutting-Edge Advances in Chunking

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Chunking involves dividing a long text or document into smaller, logically coherent segments or β€œchunks.” Each chunk usually contains one or more sentences, with the segmentation based on the text’s structure or meaning. Once divided, each chunk can be processed independently or used in subsequent tasks, such as retrieval or generation.

The role of chunking in the mainstream RAG pipeline is shown in Figure 1.

Figure 1 : The role of the Chunking process(red box) in the mainstream RAG pipeline. Image by author.

In the previous article, we explored various methods of semantic chunking, explaining their underlying principles and practical applications. These methods included:

Embedding-based methods: When the similarity between consecutive sentences drops below a certain threshold, a chunk boundary is introduced.Model-based methods: Utilize deep learning models, such as BERT, to segment documents effectively.LLM-based methods: Use LLMs to construct propositions, achieving more refined chunks.

However, since the previous article was published on February 28, 2024, there have been significant advancements in chunking over the past few months. Therefore, this article presents some of the latest developments in chunking within the RAG pipeline, focusing primarily on the following topics:

LumberChunker: A more dynamic and contextually aware… Read the full blog for free on Medium.

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