Factual Error (Urgent): Incorrect date, amount, name, position, statistic. Article corrected immediately, correction labeled.
Contextual Error (Priority): Incomplete information creating a false impression. Article supplemented, clarification added.
Headline Error (Urgent): Headline does not reflect content, sensationalism. Headline changed, URL preserved.
Spelling/Style Error (Routine): Typographical error, incorrect name. Article corrected discreetly without label.
Outdated Information (Routine): Situation changed after publication. 'Updated' marker added with new paragraph.