I'm aware that PDF/A3 allows for PDF documents to be PDF/A compliant even though they have non-PDF/A files embedded within them. I can create a PDF/A3 document with non-PDF/A attachments, but I can't figure out how to create a PDF/A3 portfolio with the same documents.
Is this possible?
Can a portfolio be PDF/A compliant?
Are portfolios suitable for longterm archiving of business documents?