This review examines Google’s LangExtract, a library designed to solve the "production nightmare" of inconsistent data extraction from large documents using standard LLM APIs.
* **Source Grounding:** Maps entities back to original text to prevent hallucinations.
* **Smart Chunking:** Splits long text at natural boundaries to preserve context.
* **Parallel Processing:** Uses `max_workers` to reduce latency.
* **Multi-pass Extraction:** Runs multiple cycles and merges results for higher accuracy.
* **Visual Interface:** Provides interactive highlighting of extracted data.
**Result:** The author successfully transformed a messy 15,000-character meeting transcript into clean, structured JSON.
* **Source Grounding:** Maps entities back to original text to prevent hallucinations.
* **Smart Chunking:** Splits long text at natural boundaries to preserve context.
* **Parallel Processing:** Uses `max_workers` to reduce latency.
* **Multi-pass Extraction:** Runs multiple cycles and merges results for higher accuracy.
* **Visual Interface:** Provides interactive highlighting of extracted data.
**Result:** The author successfully transformed a messy 15,000-character meeting transcript into clean, structured JSON.
