Unverified50% confidenceTradeoffExact time
PDF格式由ISO定义为最终呈现而设计，并非数据交换载体，提取其结构化内容需要额外OCR或解析工具
1
Sources
50%
Confidence
Long-term
Relevance
7/17/2026
First Seen
Sources
Related Claims
UnverifiedThe PDF format is a page description language released by Adobe in 1993, designed with the goal of accurately reproducing the visual appearance of documents rather than preserving semantic structure.71% similarUnverifiedPDF内部结构是基于PostScript的页面描述语言，包含字体嵌入、图层、加密等复杂元数据，需要通过PyMuPDF、pdfplumber等专用解析库才能提取可读文本67% similar
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