what is the differencee between PDFX1 and PDFX1a

[santhoshr29800103]

Hi,

I have run the PDFX-1A conformace in Acrobat XI and Save it as new PDF. If i check the Custom tab in document properties i am getting two conformances.

1. GTS_PDFVersion: PDF/X-1:2001

2. GTS_PDFConformance: PDF/X-1a:2001

Why the above PDF/X-1:2001 is showing and what is it for?

Thanks,

Santhosh

[gkaiseril]

See the Wikiapedia PDF/X article for this information. It has to do with the embedding of fonts and the format of the colors.

[Test Screen Name · Accepted solution]

No, you are getting only one conformance. PDF/X-1a. The reasons for this are historical. 18 years ago, you might have found a PDF/X-1 file that was not PDF/X-1a, but today only PDF/X-1a is still used (and that is considered almost obsolete, except by the people still using it). 

There are two different keys here. I'm going to quote ISO 15930-1, the PDF/X-1a specification:

"The value of the GTS_PDFXVersion key for files prepared in accordance with this part of ISO 15930 is (PDF/X-1:2001)... A PDF/X-1a conforming file shall be further identified using the GTS_PDFXConformance key in the Info dictionary... The value of the GTS_PDFXConformance key in a PDF/X1a conforming file shall be (PDF/X-1a:2001). "

So your file is correct. Anything else would be wrong, and rejected.

[santhoshr29800103]

Thanks for the detailed reply....