Reading order is determined by the model based on the spatial distribution of readable content, and may be out of order in some areas under extremely complex layouts.
Limited support for vertical text.
Tables of contents and lists are recognized through rules, and some uncommon list formats may not be recognized.
Code blocks are not yet supported in the layout model.
Comic books, art albums, primary school textbooks, and exercises cannot be parsed well.
Table recognition may result in row/column recognition errors in complex tables.
OCR recognition may produce inaccurate characters in PDFs of lesser-known languages (e.g., diacritical marks in Latin script, easily confused characters in Arabic script).
Some formulas may not render correctly in Markdown.
