Summary: Software Modeling

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• 1 Software Modeling

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• Underlined attributes in a class diagram in UML mean:

  That these attributes have class scope.

• Italic operations in a class diagram in UML mean:

  That these operations are abstract.

• +, # and - in a class diagram in UML mean respectively:

  Public, protected and private attributes/methods

• How do you visualize a constraint, an association, a dependency and a navigable association in UML?

  A constraint is a dotted line, an association is a closed line, a dependency is a dotted ugly arrow and a navigable association is a closed ugly arrow. 

• How do you visualize and what is the meaning of a realization, a generalization, an aggregation and a composition.

  Realization is a dotted arrow, e.g. class/template, class/interface. A generalizaiton is a closed arrow that represents an "is a" relationship, e.g. class/superclass, concrete/abstract class. An aggregation is an open diamond, it represents a "has a" relationship, e.g. professor/class. A composition is a closed diamond, it represents a containment relationship, e.g. car/carburetor.  

• What is a use case diagram?

  A use case diagram visualizes the functionality by the users point of view.

• What is a sequence diagram?

  A sequence diagram is a visualization of a situation/scenario by showing the interactions among a set of objects (not classes!) in temporal order.

• What is a collaboration/communication diagram?

  This is a spatial diagram that shows interactions and relations between objects. 

• What is an activity diagram?

  An activity diagram is a sort of object oriented flowchart that models the control flow of a computation or workflow.

• What is a statechart diagram?

  A statechart diagram is a model of the state/temporal evolution of a single object based on it's interaction with other objects.