Integrated Environmental Solutions (IES) are the global thought leaders in measurable sustainability.  Nemetschek Vectorworks and IES began collaborating on practical workflows at the early stages of this partnership and have established an effective connection between the two programs using the IFC (Industry Foundation Classes) file format, the preferred Open BIM data model of buildingSMART International. Additionally, since the release of Vectorworks Architect 2013, data can be exchanged via gbXML.