PDF/A (long-term archiving)

PDF/A is a normalised ISO version of the PDF format (ISO 19005) specially designed for long-term archiving. It integrates all fonts, images and resources within the file, prohibits encryption and content dependent on an external environment. This guarantees that the document will remain readable in 30 years without software dependency. For electronic archiving with evidentiary value, combining PDF/A with PAdES B-LTA is the recommended practice.