Part 1:


UML IS NOT A PROGRAMMING LANGUAGE____________________


UML Basic :  

 The Unified Modelling Language (UML) is the general purpose visual modeling language (A modelling language can be made up of pseudo-code, picture, diagram or long passages of description. ) that is used to specify, visualize, construct  and document the artifacts of software system. it captures decision and understanding  (Static and Dynamic behavior ) about the systems that must be constructed.

  - The static behavior defines the kinds of objects important to a system  and to implementation, as well as the relationships among the Object.  


  - The dynamic behavior defines the history of objects over time and the communications among objects to accomplish goals.


when to use UML:
a) UML as a SKETCH - use UML to make brief sketches to conve key points.
b) UML as a BLUEPRINT  - deatil definition
c) UML as a PROGRAMMING LANGUAGE - UML model to executable code


Advantage of using UML:
a) It is concise - made up of simple and straightforward notation.
b) It is comprehensive - describes all important aspect of system.
c) It is scalable - enough to  handle massive system modelling projects.
d) It  is standard - way to  represent


Different view of Model :
  There are number of ways, you can break the UML model diagram into views that capture your essence of system.

Logical view - 

Describes the abstract descriptions which is used to model what a system is made up of and how the parts interact with each other, this view include class, object, state machine, and interaction diagrams.

Process view - 

Describes the processes within your system and what must happen within your system. This view typically contains activity diagrams.

Development view - 

Describes how your system's parts are organized into modules and components.  This view typically contains package and component diagrams.

Physical view - 

Describes how the system's design, as described in the three previous views,  This view typically contains deployment diagrams.

Use case view -

Describes the functionality of the system being modeled from the perspective of the outside world.