<p>Visio 2003, 2007 and 2010 all had the same primary Visio Drawing (VSD) file format. For most users, this was great: files could be shared easily between these three versions of Visio. There were, however, some drawbacks. Most notably, the primary format was binary, which limited both the information stored in the file and how easily IT professionals and developers could work with it.
For the new Visio, we introduced an XML-based file format to provide new capabilities in Visio and improve interoperability with other applications. Other benefits of the new file format include a single unified format for end users and developers, smaller file sizes and reduced security concerns. This post provides an overview of our new file format.</p>
