I have been reading on The Document Foundation blog about the ODF and how Microsoft basically gaslighted us all into believing the OOXML is truly an open standard when it actually doesn't even use the ISO's standardised version of strict OOXML as a default in his office suit, which obviously makes ODF the better choice; but I am not knowledgeable about the PDF.

From what I've found, it was developed by Adobe up until 2008; since then, it is an "open standard" supposedly developed by the ISO.

Does this mean the Portable Document Format is legit the way ODF is? If not what would be the open alternative to PDF that ODF is to Microslop's?