Wikipedia
FXG
Flash XML Graphics (FXG) is a specification for an XML-based graphics file format for describing two-dimensional vector graphics developed by Adobe Systems. FXG was planned as a graphics interchange format for cross-application file support, to be used by Adobe Flash and Adobe Flash Player.
The XML model for FXG is based as closely as possible on the SVG XML graphics format.
The links to the FXG specification no longer work and the project seems to be abandoned.