#change.relation  a relational difference between states; especially between states before and after some event: "he attributed the change to their marriage"
  supertype:  #relation  an abstraction belonging to or characteristic of two entities or parts together
  subtype:  #difference.change  a significant change; "the difference in her is amazing"; "his support made a real difference"
  subtype:  #gradient  a graded change in the magnitude of some physical quantity or dimension
     subtype:  #gravity_gradient__gravitygradient  a gradient in the gravitational forces acting on different parts of a nonspherical object; "the gravity gradient of the moon causes the ocean tides on Earth"
     subtype:  #temperature_gradient__temperaturegradient  change in temperature as a function of distance (especially altitude)

No statement uses or specializes #change.relation; click here to add one.