### Component to component spacing checks

This group defines the spacing rules between any two components based upon the package symbol used against them. These checks vary based upon the edge of the nearby components.
The constraint values are captured in constraint manager as table and associated with DFA constraint set. A DFA constraint set can be associated with one or more placement layers in a stackup. This way one can have different rules for different layers and in different zones.
For example spacing values between the packages "DIO400" and "DIO600" in top layer of primary stackup may be different than that in a flex zone.