"Scalable Vector Graphics (SVG) is a family of specifications of an XML-based file format for two-dimensional vector graphics, both static and dynamic (i.e., interactive or animated). The SVG specification is an open standard that has been under development by the World Wide Web Consortium (W3C) since 1999."
Source: http://en.wikipedia.org/wiki/Scalable_Vector_Graphics
In Tiki,
Tiki Draw uses SVG-edit and stores the draw in the SVG format