This property holds the validation errors.
If any errors are emitted, then the document is not
Each PDF/A error indicates the problem and also the part of the
specification which is not being adhered to.
Some errors indicate problem with the PDF rather than the PDF/A
specification. In this case, no specification section is
For example, the following errors might be emitted.
Outline item 88's required Count is missing.
PDF/A-1 6.3.5 Font subsets: Type-0 font 198 is a font subset
PDF/A-1 6.3.6 Font metrics: TrueType font 201's Widths is
inconsistent with the embedded font program.
PDF/A-1 6.7.3 Document information dictionary: Metadata
15--Document "Producer" and XMP property pdf:Producer are