Custom schemas

A mechanism for defining specific structural requirements and target fields used to guide the extraction of information from datasets.

Implementation

• LangExtract (Google): An open-source, Gemini-powered library that utilizes custom schemas to convert unstructured text into structured-output by allowing users to define specific information targets for extraction.

Backlinks

• 2026 04 14 Langextract Prompt Engineer channel

Source Notes

• 2026-04-23: Engine Survival: The Critical Role of Oil Pressure and Warning Lights
• 2026-04-14: “But OpenClaw is expensive…”