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Document Data Extraction Methods Compared: Templates, OCR Rules, Machine Learning and LLMs

Short answer: There are four broad methods for extracting data from documents: fixed templates, rules and patterns on top of OCR, trained machine learning models, and large language models (LLMs). Templates and rules are cheap and predictable on documents that never change layout. Trained models ha…

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  1. 2026-11-12 14:00 · DEV Community — AI
    Document Data Extraction Methods Compared: Templates, OCR Rules, Machine Learning and LLMs

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