verapdf --format mrr my_document.pdf If you open a file and need to verify its "doctype" manually, look for these three critical features:
The answer is . It strips out JavaScript, video, audio, and external dependencies. It forces every font and image into the file. It is the legal standard for court filings (US federal courts), library archives (Internet Archive), and engineering blueprints (ISO standards). doctype pdf
<xmpMM:History> <stEvt:action>converted</stEvt:action> <stEvt:parameters>pdfa1b</stEvt:parameters> </xmpMM:History> If that string is absent, you are looking at a standard PDF, not an archival one. When someone asks for a "doctype pdf," they are really asking: "How do I guarantee this file will look the same in 50 years?" verapdf --format mrr my_document