PDF / A - the archive format
2005 has the ISO the PDF/ A format ("A" = archive) certified as a standard for long-term archiving of documents.
The PDF/ A-Standard excludes functions that impair long-term displayability. Only the subset of was defined PDF, with which documents to be archived can be described in such a way that the requirements for long-term archiving are met and the long-term legibility of the documents is guaranteed - regardless of the application software and operating system with which they were originally created.