collections {
   group {
      name: "test_group";

      parts {
         part {
            name: "background";
            type: RECT;
            mouse_events: 0;

            description {
               state: "default" 0.0;
               min: ((1000 + 100) - 1000) 100;

              rel1 {
                  relative: 0.0 0.0;                  
               }
               rel2 {
                  relative: 1.0 1.0;                  
               }
            }
         }
   }
}