Verified75% confidenceFactExact time
The text stream in document formats such as PDF is not always stored in visual order; multi-column layouts, mixed text and image arrangements, and interleaved footnotes and headers can cause the underlying text stream to be misaligned with visual order.
3
Sources
75%
Confidence
Long-term
Relevance
10/1/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIn 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.78% similarUnverifiedThe underlying format of PDF files does not store logical reading order; it only records the absolute coordinate position of each character on the page.78% similarUnverifiedIn addition to visible content, PDF files may also contain text layers, annotations, form data, bookmarks, and even hidden historical revision information, so handling only the visible portion is often not enough.74% similarUnverified将ePub线性文字流机械映射到原始手稿时，因划线删除段落、结构性空白、档案插页等因素会导致累积性文本漂移72% similar
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