Why are PDF files different even if the content is the same?
"There’s usually more than one way to create PDF documents that look like identical twins when opened in a PDF viewer. And even if you create two identical PDF documents using the exact same code, there will be small differences between the two resulting files. That’s inherent to the PDF format." i read this paragraph in "Itext in action-second edition".(p 17).Can anyone please explain me what kind of differences the author's talking about.and reason why pdf format has this defect if i may say. Files that are created on a different moment, have a different value for the CreationDate and they