Where do you know that “it is possible to print a PDF document from withint a PostScript file using Document Structuring Comments and Document Comment Extensions” from?
PDF is absolutely not part of the PostScript language itself. Nor is there anything in the DSC specifications that provides for printing a PDF document from within a PostScript file.
Attached to this posting are the two existing pieces of documentation of DSC from Adobe. Neither references such a capability.
DSC are simply “comments” within a PostScript program file which may be used by preprocessing software or external applications for various puposes, especially associated with prepress actions and placing of EPS (Encapsulated PostScript) in other graphic arts documents.
Conceivably some implementor of some PostScript product may have provided some capability to embed a PDF file or to invoke the printing of a PDF file from within a PostScript file using custom DSC. However, this is certainly not part of the official PostScript language. I have also attached those specifications as well!
- Dov