It would be nice if we had a small program that checks the PDF for subset standards like PDF/X and PDF/A. Something like a PDF validator if you like. This info can (should) be also included in pdfinfo. A free tool for this exist for Windows and Mac: http://www.pdfxreport.com/download.html
Reviczky Ádám János, Do you still experience this issue with newer soft ? Please check the status of your issue. Or close this bug.
Yes, this enhancement is still valid, there is no way to check the validity of a PDF subset at the moment.
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