Add support for model element properties management
Add support for model element properties management.
User can add additional properties to a kind of model element
for the Use Case model element,
user can add, for example, post conditions, pre-conditions, business trigger, version, ...
then whenever a new use case added to the model these new properties are accessible from the properties panel ...
In summary, extend-ability of the model elements per model element type.
The customized added properties can be used for documentation and code generation.