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Retrieval Augmented Generation
Latest   Machine Learning

Retrieval Augmented Generation

Last Updated on October 31, 2024 by Editorial Team

Author(s): Derrick Mwiti

Originally published on Towards AI.

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Photo by ZHENYU LUO on Unsplash

Retrieving documents from external sources gives language models access to data that they didn’t see during training. Particularly for question-answering systems where you want the model to answer questions based on specific documents and not from its training corpus. This is important because you can have the model answer questions from private data sources.

The process works by retrieving the relevant documents and having the model answer questions from them. Having language models help in this process is time-saving because it would be quite cumbersome to search for answers from hundreds of documents.

involves:

Loading relevant documentsCreating embeddings for the documents using an embedding modelStoring the documents and embeddings in a vector databaseQuerying the vector database using a retriever to obtain the relevant documents based on certain criteria, such as cosine similarityPassing relevant documents to the language model for question-answering

Augmenting the language models with external data is critical in ensuring that its responses are up-to-date. For example, a model that was trained before COVID-19 will make up information when asked about COVID-19. Since the language models are also trained on general domain corpora, they may not… Read the full blog for free on Medium.

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