UML


Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Wikipedia.

UML

(1)

uML

(2)

UML

(Unified Modeling Language) An object-oriented analysis and design language from the Object Management Group (OMG). Many design methodologies for describing object-oriented systems were developed in the late 1980s. UML standardizes several diagramming methods, including Grady Booch's work at Rational Software, Rumbaugh's Object Modeling Technique and Ivar Jacobson's work on use cases.

There are twelve diagrams supported under UML. Four are structural, five are behavioral and three are used for model management, which include packages, subsystems and models. See XMI.

Structural Diagrams
The four structural diagrams are class, object, component and deployment. Following is an example of the class diagram:


Class Diagram
This is one of the structural diagrams.User, User Terminal and Server are three classes that have attributes and operations. An actor is a UML "stereotype" that is external to the system. Lines between classes are "associations." The asterisk means "many," in this case, a many-to-one relationship between client and server.







Behavioral Diagrams
There are five behavioral diagrams: use case, sequence, activity, collaboration and state chart. Following are examples of four of them:



Use Case Diagram
This diagram shows a system's functions from a user's point of view, which in this case is pretty simple. All the following diagrams were created in the Telelogic Tau UML suite by Telelogic for this same example. Five of the nine possible diagrams available in UML are shown below. The Component Diagram (software module interaction), Deployment Diagram (hardware nodes) and the Activity Diagram (tasks) are not included. The Object Diagram (instantiations of classes) is rarely used. (All diagrams courtesy of Telelogic, AB, www.telelogic.com)








Sequence Diagram
Like an MSC (Message Sequence Diagram), the Sequence Diagram depicts the message flow between entities in the system. The items between double left/right arrows are UML "stereotypes." See MSC.








Collaboration Diagram
This diagram emphasizes the structure of the relationships between entities. Note that the user is associated with the user terminal in a session, and the terminal is associated with the server in a connection. The order of messages can be read by interpreting the numbers prefixes.








State Chart
This describes the finite states that take place in the system. The rectangles are the states, and the lines between them are the transitions. The connection state shows three substates. The single circles are starting points, and the double circles are the ends.
References in periodicals archive ?
Approaches of checking UML model consistency are compared according to the following parameters:
Also on the occasion, Defence Minister and UML Vice Chairman Bidhya Bhandari said the party is ready to hold discussions on peace, new constitution, and power sharing.
Section 3 presents step by step the construction of the proposed UML profile.
Limit the virtual Linux system's access to BlueCat Linux host resources so that any processes running in the UML machine can not change or damage the host computer hardware or BlueCat Linux software.
From hard real-time systems to e-business and virtually everything in between, the UML has become part of the mainstream of software development, enabling teams to reconcile and coordinate the needs of various stakeholders, to gain control of their systems' architecture, and to manage complexity.
Even now, hundreds of companies work together to keep UML current and relevant as the industry changes," said Richard Mark Soley, Ph.
At the same time that UML was becoming a de facto industry standard, an international team of modeling experts assumed the responsibility to make the language a formal standard as well.
Gupta said his party had given support to the UML in written form as the UML had also expressed commitment to Madhesh demands in written form.
The need for international standards of software quality for manufacturing and other embedded systems is central to product quality here in Japan, in the Asia-Pacific region and throughout the world," said Toshiyuki Ikari, President of UML Technology Institute Co.
Telelogic is leading the market with the first ever AUTOSAR solution based on a UML and SysML Model-Driven Development environment.
The use of Simulink and Model-Based Design continues to grow, and numerous customers are seeking to connect our tools with UML tools to support their development processes," said Jim Tung, MathWorks Fellow at The MathWorks.
Additionally, the release is integrated with Borland's recently introduced Caliber(R) DefineIT requirements definition product, enabling users to quickly build systems from requirements by creating UML and Business Process Modeling Notation (BPMN) models.