• "dc:title" entry missing in document's XMP metadata
• "F" or "UF" key missing in file specification
• Alternative description missing for an annotation
• Art structure element used as root element
• Artifact present inside tagged content
• DisplayDocTitle key is not set to true
• Div structure element used as root element
• Document structure element found which is not a root element
• Figure element on a single page with no bounding box
• First heading is not on the first level
• Font not embedded
• ID missing in Note structure element
• Image object not tagged
• Link annotation is not nested inside a Link structure element
• MCID <x> already present.
• Natural language of actual text cannot be determined
• Natural language of alternative text cannot be determined
• Natural language of an alternate name of a form field cannot be determined
• Natural language of an outline item cannot be determined
• Natural language of Contents entries in annotations cannot be determined
• Natural language of expansion text cannot be determined
• Natural language of text object cannot be determined
• No description available, yet
• Non-standard structure type "Story" is neither mapped to a standard structure type nor to another non-standard structure type
• Numbered heading skips one ore more heading levels
• Part structure element used as root element
• Path object not tagged
• PDF/UA identifier missing
• Possibly inappropriate use of a Figure structure element
• Possibly inappropriate use of a Form structure element