Unverified50% confidenceFactExact time
The concept of a 'column' does not exist in the PDF specification; text objects are simply scattered across the page using absolute coordinates.
1
Sources
50%
Confidence
Long-term
Relevance
9/17/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe underlying format of PDF files does not store logical reading order; it only records the absolute coordinate position of each character on the page.79% similarUnverifiedAnnotation and markup tools do not truly modify the original content of a PDF but instead add an annotation layer on top of the document, including highlights, underlines, comments, and signatures.72% similarUnverifiedIn a PDF file, text often does not exist as continuous paragraphs but is broken down into characters or text blocks with precise coordinates, requiring recalculation of layout, font embedding, line spacing, and other information when editing.71% similarUnverified确定性解析工具如PyMuPDF和pdfplumber无法处理扫描件或手写内容，因为这类文档没有可解析的文本层70% similar
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