This format is used as the color palette format for a variety of operating system image editors. It is used to store font templates in text and graphic editors. It allows you to change color intensity and transparency levels.
This is a vector images format created in a program for SK1 drawings, which was developed under Linux for open distribution. It contains vector graphics and is used for storing maps, brochures, logos and other illustrations. Today it’s used in vector graphics editors such as Sketch and Skencil.