.DXX File Extension
File TypeAutoCAD Drawing Interchange Attribute File
What is a DXX file?
Data file created by AutoCAD, an application used for creating 3D design drawings; may contain drawing block reference, attribute, and end-of-sequence objects; can only store a subset of information that can be saved in a .DXF file.
DXX files are used for extracting smaller amounts of information from a drawing that can be used interchangeably with other CAD applications.