text: **Object Model**
  
  The PowerPoint object model includes the Presentation.ExportAsFixedFormat3 method 
  
  to export the presentation as PDF with accessibility as described here. 
  
  1. Bookmarks for each section and slide are only included when Bookmarks:=True is 
  
  specified. 
  
  2. PDF/UA tags are only included when DocStructureTags:=True is specified. 
  
  3. The <Document> tag is only included when DocumentMarkup:=True is specified. 
  
  4. A <Link> tag is only written as a sibling of the tag for the object when 
  
  PromotedHyperlinkShape:=True is specified. 
  
  The older Presentation.ExportAsFixedFormat2 method does not include the Bookmarks, 
  
  DocumentMarkup, and PromotedHyperlinkShape parameters. It works the same as the 
  
  Presentation.ExportAsFixedFormat3 method with these 3 parameters set to False. 