Used to specify the standard to which the PDF will comply.
When set to None, the system creates a standard PDF that can contain many intelligent PDF features, including bookmarks, searchable text, and levels/files (optional content), etc.
When set to PDF/A-1b, the system creates a PDF that is compliant with the PDF/A-1b standard. The PDF/A-1b standard is a subset of the full PDF standard that is designed for long-term archiving use. Many features of the full PDF standard are not allowed in PDF/A-1b documents. PDF/A-1b output is created with no feedback given regarding any non-compliant data, and the system will silently remove non-compliant features such as levels/files (optional content).