Version migration updates the document header and modifies internal structures to comply with the target PDF specification. Features not supported in the target version are converted to compatible alternatives or flagged for manual review.
PDF 2.0 migration handles the transition from several deprecated features including PostScript Type 1 fonts, which are converted to OpenType CFF equivalents, and obsolete encryption methods, which are upgraded to AES-256.
Compliance level conversion adjusts documents between standard PDF, PDF/A, PDF/X, and PDF/E profiles. Each conversion applies the minimum set of changes needed to meet the target profile requirements.
A migration report documents every change made during conversion, including feature substitutions, removed elements, and added metadata. The report serves as a quality assurance record for archival and regulatory workflows.