GEO (Generative Engine Optimization) is the practice of optimizing content to be understood, referenced, and recommended by AI systems, making it part of AI-generated answers. This represents a paradigm shift from traditional SEO's 'click-through' focus to a new 'citation' model in the AI era. (GEO(生成式引擎优化)旨在优化内容,使其被AI系统理解、引用和推荐,成为AI生成答案的一部分。这标志着从传统SEO的“点击”思维向AI时代“引用”思维的模式转变。)
LangExtract is a Python library that leverages Large Language Models (LLMs) to extract structured information from unstructured text documents through user-defined instructions and few-shot examples. It features precise source grounding, reliable structured outputs, optimized long document processing, interactive visualization, and flexible LLM support across cloud and local models. LangExtract adapts to various domains without requiring model fine-tuning, making it suitable for applications ranging from literary analysis to clinical data extraction.
LangExtract是一个基于大型语言模型(LLM)的Python库,通过用户定义的指令和少量示例从非结构化文本中提取结构化信息。它具有精确的源文本定位、可靠的结构化输出、优化的长文档处理、交互式可视化以及灵活的LLM支持(涵盖云端和本地模型)。LangExtract无需模型微调即可适应不同领域,适用于从文学分析到临床数据提取等多种应用场景。
LangExtract is Google's official open-source Python library designed for extracting structured data (JSON, Pydantic objects) from text, PDFs, and invoices. Unlike standard prompt engineering, it's built for enterprise-grade extraction with three core advantages: precise grounding (mapping fields to source coordinates), schema enforcement (ensuring output matches Pydantic definitions), and model agnosticism (compatible with Gemini, DeepSeek, OpenAI, and LlamaIndex). This guide provides practical insights for Chinese developers on local configuration, cost optimization, and handling long documents. LangExtract是Google官方开源的Python库,专为从文本、PDF和发票中提取结构化数据(JSON、Pydantic对象)而设计。与普通Prompt工程不同,它为企业级数据提取打造,具备三大核心优势:精准溯源(字段可映射回原文坐标)、Schema强约束(保证输出符合数据结构)、模型无关性(兼容Gemini、DeepSeek、OpenAI及LlamaIndex)。本指南基于真实项目经验,涵盖国内环境配置、API成本优化和长文档处理技巧。