PDF creation date and document ID
Needed some advice so am posting my query here. I have come across three PDF documents all of them with different application created dates but somehow all three documents have the same Document ID.
Adobe states that Document IDs are unique ( https://developer.adobe.com/xmp/docs/XMPNamespaces/xmpMM/)
Just wondering if anyone has come across such a weird scenario before. I do not have access to the original documents btw.
Appreciate if any kind soul out there could shed some light or guide me to the relevant resources.
Your link isn't working -- I get a 404 error.
PDF is an open format: anyone can create PDF files. No everyone who does so follows the PDF standard, or any particular Adobe Guidelines.
You can't approach this by referring only to a PDF standard text, or to Adobe recommendations. You have to know what real-world PDF-creating software does. If you can identify the software used to create the documents with any degree of confidence, and its release number, then that's fairly easy.
@athulin fyi the link has a trailing bracket “)” which is causing the 404
@harryparsonage Blush -- obvious once you pointed it out ...
@RaghavRaman The linked page describes how managed files attributes should be used, i.e. files stored in a document management system. Unmanaged files (i.e. most files in existence, I imagine) can do more or less what they like. What the particular PDF-writing app that produced the files you referred to does is anybody's guess: but you are probably yourself in the best position to find out.