What is UML?
• The Unified Modeling Language (UML) is a standard language for specifying, visualizing, constructing, and documenting the artifacts of software systems, as well as for business modeling and other non-software systems.
• UML represents a collection of best engineering practices that have proven successful in the modeling of large and complex systems.
• UML is a very important part of developing object oriented software and the software development process. UML uses mostly graphical notations to express the design of software projects.
• Using UML helps project teams communicate, explore potential designs, and validate the architectural design of the software.
Goals of UML
The primary goals in the design of the UML were:
• Provide users with a ready-to-use, expressive visual modeling language so they can develop and exchange meaningful models.
• Provide extensibility and specialization mechanisms to extend the core concepts.
• Be independent of particular programming languages and development processes.
• Provide a formal basis for understanding the modeling language.
• Encourage the growth of the OO tools market.
• Support higher-level development concepts such as collaborations, frameworks, patterns and components.
• Integrate best practices.
Why Use UML?
• As the strategic value of software increases for many companies, the industry looks for techniques to automate the production of software and to improve quality and reduce cost and time-to-market. These techniques include component technology, visual programming, patterns and frameworks.
• Businesses also seek techniques to manage the complexity of systems as they increase in scope and scale. In particular, they recognize the need to solve recurring architectural problems, such as physical distribution, concurrency, replication, security, load balancing and fault tolerance.
Additionally, the development for the World Wide Web, while making some things simpler, has exacerbated these architectural problems. The Unified Modeling Language (UML) was designed to respond to these needs.
History of UML
• The 1.0 version of UML was released on the 13th of January, 1997.
• The efforts of Grady Booch, Jim Rumbaugh and Ivar Jacobson resulted in the release of the UML.
Types of UML Diagrams
• Use Case Diagram
• Class Diagram
• Interaction Diagram
Sequence Diagram
Collaboration Diagram
• State Diagram
• Activity Diagram
• Physical Diagrams
Component Diagram
Deployment Diagram