2.0 http://www.w3.org/2005/ATom High Code APIs & Free Apps for PowerPoint File AuTomation – Merge Pdf, PPT, Pptx and Many Other File Formats Using C#https://products.aspose.com/slides/net/merger/Re......File Automation – Merge PDF, PPT, PPTX and Many Other File Formats...ecent content in Merge PDF, PPT, PPTX and Many Other File Formats...