abstract class
[programming] In ArcObjects, a specification for subclasses that is often shown on object model diagrams to help give structure to the diagram. An abstract class is not defined in a type library and cannot be instantiated.
A Class representing the new model inherits from the abstract class: Ecosystem Process. This new class must encapsulate any specific characteristics of the new ecosystem model.
The constraints are the instantiations of the abstract class by concrete names, attribute values for Priority, Importance, Goal value, etc. and concrete methods e.g. computing the current value, the severity and proposing plan.
 See also: Model, Class, Object, Feature, GIS
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