Is there some relatively simple method to determine a document's PDF version?
To be clear, I mean the document itself, not the application used to create it.
I'm trying to store PDF documents from external sources in a document repository.
Its manuals are unclear on Adobe Acrobat version support, although I have had problems with Acrobat v 9 in the past.
My source provided me with PDF documents that I was told were saved as versions 8, 9, 10 and 11 from Acrobat Pro XI.
Acrobat Reader XI is the only Adobe application I have and I don't want to write an application simply to confirm the PDF version.
When I open the documents using Reader XI and check their properties, I see the following:
nominal 8.0: PDF Version 1.7 (Acrobat 8.x)
nominal 9.0: PDF version 1.7 Adobe Extension Level 3 (Acrobat 9.x)
nominal 10.0: PDF version 1.7 Adobe Extension Level 8 (Acrobat X)
nominal 11.0: PDF version 1.5 (Acrobat 6.x)
The last one doesn't make sense, but I have another PDF saved as v 11 from Acrobat Distiller 11.0 that shows the same version in its properties.
So my questions:
1. Is the Acrobat properties display accurate?
2. I'm particuarly concerned about the 11.0 PDF documents since their Acrobat properties don't match the version they're supposed to be.
3. Is there some other way to check a document's PDF version (other than writing an application), e.g., opening it with a text editor and finding a version string?