-/// Coefficient A of the sketch plane (Ax+By+Cz+D=0)
-const std::string SKETCH_ATTR_PLANE_A("PlaneA");
-/// Coefficient B of the sketch plane
-const std::string SKETCH_ATTR_PLANE_B("PlaneB");
-/// Coefficient C of the sketch plane
-const std::string SKETCH_ATTR_PLANE_C("PlaneC");
-/// Coefficient D of the sketch plane
-const std::string SKETCH_ATTR_PLANE_D("PlaneD");
+/// Origin point of the sketcher in 3D space
+const std::string SKETCH_ATTR_ORIGIN("Origin");
+/// Vector X inside of the sketch plane
+const std::string SKETCH_ATTR_DIRX("DirX");
+/// Vector Y inside of the sketch plane
+const std::string SKETCH_ATTR_DIRY("DirY");
+/// Vector Z, normal to the sketch plane
+const std::string SKETCH_ATTR_NORM("Norm");
+/// All features of this sketch (list of references)
+const std::string SKETCH_ATTR_FEATURES("Features");