I resolve it! I used the "Validate PDF / A" process which returns a "ValidationResultPDFA" object from which the "@isPDFA" string can be extracted. Later I made a simple check on that string (true).

Hi guys, i'm new in this fantastic community, so hello everyone! I have a problem with a process in LiveCycle Workbench ES4:how can i understand if a input document is a simple pdf or a pdfa?I've tried with getDocContentType(/process_data/@inputDocument)but either it's pdf or pdfa it always gives me...