XY graph is a graphic displayer. It allows displaying a graphic flow
of values specified by coordinates (x, y) from picture script. XY graph is not
a D2000 system object (unlike object of
Graph type) and is always part of object of Picture type.
The process D2000 HI allows editing XY graphs only, they are being created in the process D2000 GrEditor.
Each XY graph allows to display at most 20 flows at the same time.