What is the Portable Document Format?
Based on PostScript and on ATM with font substitution, Adobe has developed and published a Portable Document Format specification [Adobe93]. Like PostScript, the PDF specifications are open so that third-party developers can create and read PDF files using their own applications. Several developers have already started adding PDF creation features to their document production applications, e.g., FrameMaker can automatically create PDF Bookmarks (see below) when it prints to a PostScript file.