UML

UML is a standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems.

UML was created by Object Management Group (OMG) and UML 1.0 specification draft was proposed to the OMG in January 1997.

UML diagrams are not only made for developers but also for business users, common people and anybody interested to understand the system. The system can be a software or non software. So it must be clear that UML is not a development method rather it accompanies with processes to make a successful system.

At the conclusion, the goal of UML can be defined as a simple modeling mechanism to model all possible practical systems in today’s complex environment.

UML have several types of diagrams that can be used to describe different points of views. Let’s talk about some of these. 

Class Diagrams

The purpose of a class diagram is to depict the classes within a model. In an object oriented application, classes have attributes (member variables), operations (member functions) and relationships with other classes. The UML class diagram can depict all these things quite easily. The fundamental element of the class diagram is an icon the represents a class. According to Martin (2010), class icon is simply a rectangle divided into three compartments. The topmost compartment contains the name of the class. The middle compartment contains a list of attributes (member variables),

and the bottom compartment contains a list of operations (member functions). In many diagrams, the bottom two compartments are omitted. Even when they are present, they typically do not show every attribute and operations. The goal is to show only those attributes and operations that are useful for the particular diagram.

Example of Class Diagram

UML Use Case Diagrams

Use cases are powerful tools for analysts to use when partitioning the functionality of a system. Use case relationships and the corresponding diagrams help analysts to structure use cases such that their textual descriptions contain a minimum of redundant information; thus making the whole text document much easier to maintain. But use cases are not design tools. They do not specify the structure of the eventual software, nor do they imply the existence of any classes or objects. They are purely functional descriptions written in a formalism that is completely separate from software design.

Use cases separate the system into actors and use cases. Actors represent roles that can are played by users of the system. Those users can be humans, other computers, pieces of hardware, or even other software systems. The only criterion is that they must be external to the part of the system being partitioned into use cases. They must supply stimuli to that part of the system, and the must receive outputs from it. 

Use cases (“Engineering Notebook”, 1998) describe the behavior of the system when one of these actors sends one particular stimulus. This behavior is described textually. It describes the nature of the stimulus that triggers the use case; the inputs from and outputs to other actors, and the behaviors that convert the inputs to the outputs. The text of the use case also usually describes everything that can go wrong during the course of the specified behavior, and what remedial action the system will take.

Example: Clerk checks out an item.

Activity Diagram

            Activity diagrams are normally used for business process modeling, for modeling the logic captured by a single use case or usage scenario, or for modeling the detailed logic of a business rule.  Although UML activity diagrams could potentially model the internal logic of a complex operation it would be far better to simply rewrite the operation so that it is simple enough that you don’t require an activity diagram. In many ways UML activity diagrams are the object-oriented equivalent of flow charts and data flow diagrams (DFDs) from structured development.

Booking a Concert Ticket

Reference

http://www.objectmentor.com/resources/articles/umlClassDiagrams.pdf      class diagram

http://www.objectmentor.com/resources/articles/usecases.pdf   use case

http://d0server1.fnal.gov/www/online_computing/meetings/Weekly/M_990507/StateTutorial.pdf   state

http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep03/f_umlbasics_db.pdf

-LAAAquino

-ADFeraer

Something About CvSU

           Cavite State University is located at the heart of Indang, Cavite. From being Indang Intermediate School (1906), Indang Farm School (1927), Indang Rural High School, Don Severino Agricultural School (1958), it was converted into Don Severino Agricultural College (1964) and later become a state university on January 22, 1998 and later had campuses in other towns in Cavite.


          With its vision “The premier university in historic Cavite recognized for excellence in the development of globally competitive and morally upright individuals.” and its mission, “Cavite State University shall provide excellent, equitable and relevant educational opportunities in the arts, sciences and technology through quality instruction and responsive research and development activities. It shall produce professional, skilled and morally upright individuals.”; we will notice the eagerness of the institution to train each students in the skills required by the national development.


          Have you notice the monument in front of CvSU? It is called “Laya at Diwa”-the landmark of CvSU, created by Jonnel Castrillo of Imus, Cavite. Each detail of this artwork symbolizes something.


         The unchained female figure, holding a book, represents the empowered Filipino woman. She is today's contemporary woman - a mother, a nurturer, an educator, and a servant to humanity. She is also beauty personified.


        The male figure with a pen and a torch represents the dignified Filipino father — strong, prominent, dignified and excellent in his field of endeavor besides being portrayed as persistent searcher of truth. The flame of the torch carries the letters CvSU for Cavite State University — serving as the guiding light of his noble quest. The interlocked arms of the man and the woman signify unity of purpose and direction.


        The child in a dynamic pose standing on top of the pillar, represents the youth in general and recognized as the proverbial hope of the future that needs molding and nurturing. The dove symbolizes peace and freedom.


        The central pillar symbolizes growth and development. It represents humanity's common aspiration for an improved quality of life - a kind of development with equity and harmony. It is ever growing, ever aiming higher but always deeply rooted in history.


        The entire artwork is mounted on a CvSU logo-shaped base to serve as a fitting reminder to the entire CvSU community of its great responsibility to remain faithful to the University's vision and mission and to hold sacred its tenets of TRUTH, EXCELLENCE, and SERVICE.


        Upon completion, murals will be installed on the sides of the base. These will depict the important historical events that took place in the province of Cavite and throughout the Philippines. The murals will portray events showing Filipino's life and spirit under imperial Spain and other colonizers including Filipino's continuing struggle for freedom and independence.(http://www.cvsu.edu.ph/index.php?option=com_content&view=article&id=48&Itemid=55)


       Yan ang CvSU. Nagnanais na maging globally competitive ang produkto nila. Bagaman karamihan sa mga nag-aaral na estudyante ay pawang may mga reklamo tungkol sa mahal daw na miscellaneous fee, kulang na upuan sa classroom at walang matambayan, hindi ba’t natutulungan naman ng mga kaguruan ng CvSU ang mga mag-aaral sa pagpanday ng kanilang karunungan? Sabi nga, habang nag-aaral ka pa lang, nagsisimula ka ng maging globally competitive. Ikaw, anong masasabi mo?

-adferaer

-laaaquino