P1 >alert= P2
P1 =mark= P2
We can think of a cgm enumerator to produce continuous glucose measurements. We can think of alert concentrator to generate alerts. We can think of a mark operator to mark certain problem elements. The mark operator can have different versions, such as mark1, mark2, and so on.
P1 =mark1= P2
P3 =mark2= P4
These operators can be extended to define a
visual language to specify visual computation cycles.