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LLM structured output: XML tags for delimiters, JSON for data

Developers often struggle with Large Language Models (LLMs) generating structured output that includes conversational text, making parsing difficult. A common solution involves using XML tags as delimiters around JSON data, allowing models to include preamble or reasoning while ensuring the core data remains parsable. Alternatively, when APIs support schema enforcement during decoding, directly requesting raw JSON is more efficient and safer, especially for simpler data structures. AI

IMPACT Provides practical strategies for developers to reliably extract structured data from LLM responses, improving application robustness.

RANK_REASON This article discusses practical techniques for handling LLM output, focusing on data formatting and parsing strategies.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

LLM structured output: XML tags for delimiters, JSON for data

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  1. dev.to — LLM tag TIER_1 English(EN) · Gabriel Anhaia ·

    JSON or XML Tags for LLM Output: The Format That Holds Under Pressure

    <ul> <li> <strong>Book:</strong> <a href="https://www.amazon.com/dp/B0GX38N645" rel="noopener noreferrer">Prompt Engineering Pocket Guide: Techniques for Getting the Most from LLMs</a> </li> <li> <strong>Also by me:</strong> <em>Thinking in Go</em> (2-book series) — <a href="http…