title: Generate identical pdf files with iText given the same code and data
body: <p>I'm trying out iText in java and I noticed that generating separate pdfs using the same code and data produces files that have the same content but are binary different.<br>
  By comparing them as text, one obvious difference is a timestamp in the file.<br>
  Additionally though I see a number of small differences in metadata that I am unable to interpret.</p>
  
  <p>Is there a way to generate identical files given the same java code and input data?</p>