Uml Common Mechanism
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The document discusses four common mechanisms in the Unified Modeling Language (UML): (i) specifications which provide textual definitions for graphical notations, (ii) adornments like notes that attach constraints to elements, (iii) common divisions between classes and objects, and (iv) extensibility mechanisms that allow customizing UML through stereotypes, tagged values, and constraints.
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Lab%201
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Introduction to unified language modeling.pptxMBIEDANGOMEGNIFRANKG What is UML?
Unified Modeling Language (UML) is a standardized visual modeling language that is a versatile, flexible, and user-friendly method for visualizing a system’s design. Software system artifacts can be specified, visualized, built, and documented with the use of UML.
We use UML diagrams to show the behavior and structure of a system.
UML helps software engineers, businessmen, and system architects with modeling, design, and analysis.
Why do we need UML?
We need UML (Unified Modeling Language) to visually represent and communicate complex system designs, facilitating better understanding and collaboration among stakeholders. Below is why we need UML:
Complex applications need collaboration and planning from multiple teams and hence require a clear and concise way to communicate amongst them.
Businessmen do not understand code. So UML becomes essential to communicate with non-programmers about essential requirements, functionalities, and processes of the system.
A lot of time is saved down the line when teams can visualize processes, user interactions, and the static structure of the system.
3. Types of UML Diagrams
UML is linked with object-oriented design and analysis. UML makes use of elements and forms associations between them to form diagrams. Structural UML Diagrams
Structural UML diagrams are visual representations that depict the static aspects of a system, including its classes, objects, components, and their relationships, providing a clear view of the system’s architecture. Structural UML diagrams include the following types:
4.1. Class Diagram
The most widely use UML diagram is the class diagram. It is the building block of all object oriented software systems. We use class diagrams to depict the static structure of a system by showing system’s classes, their methods and attributes. Class diagrams also help us identify relationship between different classes or objects. 4.2. Composite Structure Diagram
We use composite structure diagrams to represent the internal structure of a class and its interaction points with other parts of the system.
A composite structure diagram represents relationship between parts and their configuration which determine how the classifier (class, a component, or a deployment node) behaves.
They represent internal structure of a structured classifier making the use of parts, ports, and connectors.
We can also model collaborations using composite structure diagrams.
They are similar to class diagrams except they represent individual parts in detail as compared to the entire class.
4.3. Object Diagram
An Object Diagram can be referred to as a screenshot of the instances in a system and the relationship that exists between them. Since object diagrams depict behaviour when objects have been instantiated, we are able to study the behaviour of the system at a particular instant.
An object diagram is similar to a class diagram except it shows the instances of classes in the system.
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