This document provides an introduction to UML (Unified Modeling Language) modeling. It discusses various UML concepts including relationships between classes like association, aggregation, and composition. It also covers interfaces and realizations. Specifically:
1) Relationships define connections between classes and include association, inheritance, dependencies, and more. Associations denote conceptual links between classes while aggregations and compositions define part-whole relationships.
2) Aggregations represent weak connections where parts can exist independently of the whole. Compositions are stronger, meaning parts only exist within the whole. Interfaces define a class's operations without implementation, and realizations show that a class conforms to an interface's contract.
3) The
This document describes object-oriented concepts and modeling techniques. It defines key terms like object, class, instance, relationships between classes including generalization, aggregation, and association. It provides examples of modeling a car and sales order system. It also describes domain modeling and analysis techniques like identifying objects and classes from a problem statement, developing a data dictionary, and structuring classes using inheritance.
This document provides a tutorial on using the Unified Modeling Language (UML) and Together 2006 modeling software. It covers the basic elements of UML including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It then demonstrates how to model an online course registration system using UML diagrams in Together 2006. Homework and additional reading resources are also listed.
The document provides an introduction to Unified Modeling Language (UML). It discusses what UML is, the history and versions of UML, and why UML is used. It also describes the different types of UML diagrams that will be covered, including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state diagrams. Finally, it discusses key object-oriented concepts like abstraction, encapsulation, inheritance, polymorphism, and how they relate to UML modeling.
UML, visual modeling language, common divisions, a concept model of UML, structural things, the relationship in UML, Common Mechanisms in the UML, Fundamentals of Software Engineering
The document discusses UML (Unified Modeling Language) and object-oriented software development. It describes the software development life cycle and various modeling techniques used in UML, including use case diagrams, class diagrams, sequence diagrams, and collaboration diagrams. It explains key UML concepts such as classes, objects, attributes, operations, actors, and relationships. The benefits of visual modeling and UML are also summarized.
The document discusses the Unified Modeling Language (UML) which is a general-purpose modeling language used to visualize, specify, construct, and document software systems. UML uses graphical notation to represent the design of software projects including concepts like use case diagrams, class diagrams, sequence diagrams, and more. It provides a standard way to visualize a system from different perspectives including structural and behavioral views.
This document provides an overview of various Unified Modeling Language (UML) diagrams, including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It describes the basic components and purposes of each diagram type.
The document discusses Unified Modeling Language (UML) and class diagrams. UML was created by the Object Management Group to provide a standard language for modeling software systems. A class diagram visually shows the classes, attributes, operations, and relationships among classes in a system. Relationships include associations, aggregations, compositions, and generalizations. The document provides examples and definitions of these relationships and how they are depicted in class diagrams.
This document describes object-oriented concepts and modeling techniques. It defines key terms like object, class, instance, relationships between classes including generalization, aggregation, and association. It provides examples of modeling a car and sales order system. It also describes domain modeling and analysis techniques like identifying objects and classes from a problem statement, developing a data dictionary, and structuring classes using inheritance.
This document provides a tutorial on using the Unified Modeling Language (UML) and Together 2006 modeling software. It covers the basic elements of UML including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It then demonstrates how to model an online course registration system using UML diagrams in Together 2006. Homework and additional reading resources are also listed.
The document provides an introduction to Unified Modeling Language (UML). It discusses what UML is, the history and versions of UML, and why UML is used. It also describes the different types of UML diagrams that will be covered, including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state diagrams. Finally, it discusses key object-oriented concepts like abstraction, encapsulation, inheritance, polymorphism, and how they relate to UML modeling.
UML, visual modeling language, common divisions, a concept model of UML, structural things, the relationship in UML, Common Mechanisms in the UML, Fundamentals of Software Engineering
The document discusses UML (Unified Modeling Language) and object-oriented software development. It describes the software development life cycle and various modeling techniques used in UML, including use case diagrams, class diagrams, sequence diagrams, and collaboration diagrams. It explains key UML concepts such as classes, objects, attributes, operations, actors, and relationships. The benefits of visual modeling and UML are also summarized.
The document discusses the Unified Modeling Language (UML) which is a general-purpose modeling language used to visualize, specify, construct, and document software systems. UML uses graphical notation to represent the design of software projects including concepts like use case diagrams, class diagrams, sequence diagrams, and more. It provides a standard way to visualize a system from different perspectives including structural and behavioral views.
This document provides an overview of various Unified Modeling Language (UML) diagrams, including use case diagrams, class diagrams, activity diagrams, sequence diagrams, and state machine diagrams. It describes the basic components and purposes of each diagram type.
The document discusses Unified Modeling Language (UML) and class diagrams. UML was created by the Object Management Group to provide a standard language for modeling software systems. A class diagram visually shows the classes, attributes, operations, and relationships among classes in a system. Relationships include associations, aggregations, compositions, and generalizations. The document provides examples and definitions of these relationships and how they are depicted in class diagrams.
This document provides an overview of UML (Unified Modeling Language) design. It defines UML, outlines its history and objectives. It describes the basic components of a class diagram in UML including the class name, attributes, and methods sections. The document provides examples of class diagrams for real world scenarios involving food items in a grocery store, students, relationships between classes like persons and airlines, aggregation between airliners and crew, and composition between houses and rooms. It also covers inheritance, interfaces, and examples of tools that can be used to create UML diagrams.
The document discusses static UML diagrams and provides an example of a class diagram for an ATM system. It begins by defining a class diagram and its key components - classes, attributes, operations, and relationships. It then explains different types of class relationships like inheritance, association, aggregation, and composition. The document concludes by providing a full class diagram example for an ATM system to demonstrate how all the concepts discussed come together in a diagram.
Uml unified-modeling-language-presented by dileepmekhap
The Unified Modeling Language (UML) is used to specify, visualize, modify, construct and document the artifacts of an object-oriented software-intensive system under development.UML combines techniques from data modeling (entity relationship diagrams), business modeling (work flows), object modeling, and component modeling.
The document provides an overview of the Unified Modeling Language (UML). It discusses UML's building blocks including elements, relationships, and diagrams. It describes the different types of UML diagrams including use case diagrams, class diagrams, sequence diagrams, activity diagrams, and deployment diagrams. The document focuses on use case diagrams, explaining what use cases and actors are, and how to identify them.
The document provides an overview of the Unified Modeling Language (UML) including its key concepts, terms, and diagram types. It discusses object-orientation, use cases, class diagrams, behavioral modeling using sequence, collaboration, state chart and activity diagrams. It also covers implementation using component and deployment diagrams. The main UML diagram types are use case, class, sequence, state chart, activity, component and deployment diagrams.
This document provides an introduction to Unified Modeling Language (UML). It defines UML as a general purpose modeling language used to visualize, specify, construct and document artifacts of a software system. The key building blocks of UML include things like classes, interfaces, use cases and relationships between these things. It also describes the different types of UML diagrams like class, sequence, activity diagrams and how they can be used. Finally, it stresses the importance of identifying the problem domain when developing models.
This document provides an overview of class diagrams and use case diagrams in the Unified Modeling Language (UML). It defines key elements of class diagrams like classes, attributes, operations, and relationships. It also explains different types of relationships like association, aggregation, and generalization. The document then discusses use case diagrams and how to identify actors and scenarios. It emphasizes focusing on the user's goal when defining use cases rather than system tasks. Finally, it notes that use case diagrams show multiple use cases and actors to provide system context.
The document provides an introduction to the Unified Modeling Language (UML). It discusses the key principles of modeling and an overview of UML. The UML is a standard language for writing software blueprints and can be used to visualize, specify, construct, and document software systems. The UML has building blocks like classes, objects, use cases and relationships. It consists of diagrams like class diagrams, sequence diagrams, and state machine diagrams. The UML addresses multiple views of a system including use case, design, interaction and implementation views.
This document outlines the components required for a case tools laboratory project. The project must include 9 components: developing a problem statement, use cases, a domain model with class diagram, sequence diagrams, state charts and activity diagrams, an architecture diagram, and testing each layer of the system. It also provides 15 suggested domains for mini-projects and lists recommended modeling tools.
The document provides an overview of the Unified Modeling Language (UML) including what UML is, why it is used, common UML diagrams, and tools for UML modeling. UML is a standard modeling language used to visualize, specify, construct and document artifacts of a software system. Common UML diagrams include use case diagrams, class diagrams, sequence diagrams, state diagrams and collaboration diagrams. Popular UML modeling tools mentioned are ArgoUML, Rational Rose, UML Studio and TogetherSoft Control Center.
This document provides an introduction to object-oriented programming concepts including classes, objects, relationships between classes and objects, and modeling with UML diagrams. It discusses key OOP concepts like encapsulation, inheritance, and polymorphism. It also explains the object-oriented development life cycle including analysis, design, and implementation phases. Specific examples of class diagrams are provided for a library management system to illustrate class relationships and modeling.
Introduction to Object orientation , Modeling as a Design Technique Modeling ...DhwaniDesai21
This document provides an overview of object-oriented modeling concepts including the class model, state model, and interaction model. It discusses modeling as a design technique and introduces key concepts like abstraction. It then describes the three models in more detail providing examples of each. The class model represents static structure, the state model represents dynamic behavior over time, and the interaction model represents collaboration between objects.
The document discusses two software architecture styles: generalization and layered.
Generalization style uses inheritance to capture common properties between similar entities, emphasizing an "is-a" relationship. Modules in this style can inherit properties from parent modules to reduce complexity and enable reuse.
Layered style organizes modules into logical groupings or layers that build upon each other. Each layer provides well-defined services to layers above it, with dependencies only flowing downward between layers. This promotes modularity, portability, and information hiding.
This document provides an overview of static UML diagrams, specifically class diagrams. It discusses key elements of class diagrams like classes, attributes, associations, dependencies, interfaces, generalization/specialization, and more. Examples are provided to illustrate notation for these concepts like class names, attributes, association types, visibility, constraints, and others. Common class diagram notation is summarized in figures included in the document.
UML (Unified Modeling Language) is a standardized modeling language used to visualize, specify, construct, and document software systems. It uses mainly graphical notations to express object-oriented analysis and design, simplifying the complex process of software design. Some key reasons to use UML include that it uses clear graphical notation rather than natural language, helps acquire an overall view of a system, and is not dependent on any one programming language. Common UML diagrams include use case diagrams, class diagrams, sequence diagrams, collaboration diagrams, and state diagrams. UML modeling tools allow creating and managing UML diagrams and have become an important part of modern software design.
The document discusses software architecture, including definitions, principles, patterns, and modeling techniques. It defines architecture as the structure of a system comprising software elements and relationships. Some key principles discussed are single responsibility, open/closed, and dependency inversion. Common patterns like MVC, layered, and multitier architectures are explained. The document also introduces Unified Modeling Language (UML) for modeling systems using diagrams like class, component, and package diagrams.
The document discusses various modeling techniques used to model complex software systems, including UML diagrams. It describes different types of UML diagrams like class diagrams, object diagrams, sequence diagrams, and collaboration diagrams. It explains concepts like classes, associations, generalizations, aggregations, and interfaces. It provides examples of how these diagrams can be used to model different types of relationships between classes and objects.
The objective is to explain how a software design may be represented as a set of interacting objects that manage their own state and operations and to introduce various models that describe an object-oriented design.
Impact of Effective Performance Appraisal Systems on Employee Motivation and ...Dr. Nazrul Islam
Healthy economic development requires properly managing the banking industry of any
country. Along with state-owned banks, private banks play a critical role in the country's economy.
Managers in all types of banks now confront the same challenge: how to get the utmost output from
their employees. Therefore, Performance appraisal appears to be inevitable since it set the
standard for comparing actual performance to established objectives and recommending practical
solutions that help the organization achieve sustainable growth. Therefore, the purpose of this
research is to determine the effect of performance appraisal on employee motivation and retention.
This document provides an overview of UML (Unified Modeling Language) design. It defines UML, outlines its history and objectives. It describes the basic components of a class diagram in UML including the class name, attributes, and methods sections. The document provides examples of class diagrams for real world scenarios involving food items in a grocery store, students, relationships between classes like persons and airlines, aggregation between airliners and crew, and composition between houses and rooms. It also covers inheritance, interfaces, and examples of tools that can be used to create UML diagrams.
The document discusses static UML diagrams and provides an example of a class diagram for an ATM system. It begins by defining a class diagram and its key components - classes, attributes, operations, and relationships. It then explains different types of class relationships like inheritance, association, aggregation, and composition. The document concludes by providing a full class diagram example for an ATM system to demonstrate how all the concepts discussed come together in a diagram.
Uml unified-modeling-language-presented by dileepmekhap
The Unified Modeling Language (UML) is used to specify, visualize, modify, construct and document the artifacts of an object-oriented software-intensive system under development.UML combines techniques from data modeling (entity relationship diagrams), business modeling (work flows), object modeling, and component modeling.
The document provides an overview of the Unified Modeling Language (UML). It discusses UML's building blocks including elements, relationships, and diagrams. It describes the different types of UML diagrams including use case diagrams, class diagrams, sequence diagrams, activity diagrams, and deployment diagrams. The document focuses on use case diagrams, explaining what use cases and actors are, and how to identify them.
The document provides an overview of the Unified Modeling Language (UML) including its key concepts, terms, and diagram types. It discusses object-orientation, use cases, class diagrams, behavioral modeling using sequence, collaboration, state chart and activity diagrams. It also covers implementation using component and deployment diagrams. The main UML diagram types are use case, class, sequence, state chart, activity, component and deployment diagrams.
This document provides an introduction to Unified Modeling Language (UML). It defines UML as a general purpose modeling language used to visualize, specify, construct and document artifacts of a software system. The key building blocks of UML include things like classes, interfaces, use cases and relationships between these things. It also describes the different types of UML diagrams like class, sequence, activity diagrams and how they can be used. Finally, it stresses the importance of identifying the problem domain when developing models.
This document provides an overview of class diagrams and use case diagrams in the Unified Modeling Language (UML). It defines key elements of class diagrams like classes, attributes, operations, and relationships. It also explains different types of relationships like association, aggregation, and generalization. The document then discusses use case diagrams and how to identify actors and scenarios. It emphasizes focusing on the user's goal when defining use cases rather than system tasks. Finally, it notes that use case diagrams show multiple use cases and actors to provide system context.
The document provides an introduction to the Unified Modeling Language (UML). It discusses the key principles of modeling and an overview of UML. The UML is a standard language for writing software blueprints and can be used to visualize, specify, construct, and document software systems. The UML has building blocks like classes, objects, use cases and relationships. It consists of diagrams like class diagrams, sequence diagrams, and state machine diagrams. The UML addresses multiple views of a system including use case, design, interaction and implementation views.
This document outlines the components required for a case tools laboratory project. The project must include 9 components: developing a problem statement, use cases, a domain model with class diagram, sequence diagrams, state charts and activity diagrams, an architecture diagram, and testing each layer of the system. It also provides 15 suggested domains for mini-projects and lists recommended modeling tools.
The document provides an overview of the Unified Modeling Language (UML) including what UML is, why it is used, common UML diagrams, and tools for UML modeling. UML is a standard modeling language used to visualize, specify, construct and document artifacts of a software system. Common UML diagrams include use case diagrams, class diagrams, sequence diagrams, state diagrams and collaboration diagrams. Popular UML modeling tools mentioned are ArgoUML, Rational Rose, UML Studio and TogetherSoft Control Center.
This document provides an introduction to object-oriented programming concepts including classes, objects, relationships between classes and objects, and modeling with UML diagrams. It discusses key OOP concepts like encapsulation, inheritance, and polymorphism. It also explains the object-oriented development life cycle including analysis, design, and implementation phases. Specific examples of class diagrams are provided for a library management system to illustrate class relationships and modeling.
Introduction to Object orientation , Modeling as a Design Technique Modeling ...DhwaniDesai21
This document provides an overview of object-oriented modeling concepts including the class model, state model, and interaction model. It discusses modeling as a design technique and introduces key concepts like abstraction. It then describes the three models in more detail providing examples of each. The class model represents static structure, the state model represents dynamic behavior over time, and the interaction model represents collaboration between objects.
The document discusses two software architecture styles: generalization and layered.
Generalization style uses inheritance to capture common properties between similar entities, emphasizing an "is-a" relationship. Modules in this style can inherit properties from parent modules to reduce complexity and enable reuse.
Layered style organizes modules into logical groupings or layers that build upon each other. Each layer provides well-defined services to layers above it, with dependencies only flowing downward between layers. This promotes modularity, portability, and information hiding.
This document provides an overview of static UML diagrams, specifically class diagrams. It discusses key elements of class diagrams like classes, attributes, associations, dependencies, interfaces, generalization/specialization, and more. Examples are provided to illustrate notation for these concepts like class names, attributes, association types, visibility, constraints, and others. Common class diagram notation is summarized in figures included in the document.
UML (Unified Modeling Language) is a standardized modeling language used to visualize, specify, construct, and document software systems. It uses mainly graphical notations to express object-oriented analysis and design, simplifying the complex process of software design. Some key reasons to use UML include that it uses clear graphical notation rather than natural language, helps acquire an overall view of a system, and is not dependent on any one programming language. Common UML diagrams include use case diagrams, class diagrams, sequence diagrams, collaboration diagrams, and state diagrams. UML modeling tools allow creating and managing UML diagrams and have become an important part of modern software design.
The document discusses software architecture, including definitions, principles, patterns, and modeling techniques. It defines architecture as the structure of a system comprising software elements and relationships. Some key principles discussed are single responsibility, open/closed, and dependency inversion. Common patterns like MVC, layered, and multitier architectures are explained. The document also introduces Unified Modeling Language (UML) for modeling systems using diagrams like class, component, and package diagrams.
The document discusses various modeling techniques used to model complex software systems, including UML diagrams. It describes different types of UML diagrams like class diagrams, object diagrams, sequence diagrams, and collaboration diagrams. It explains concepts like classes, associations, generalizations, aggregations, and interfaces. It provides examples of how these diagrams can be used to model different types of relationships between classes and objects.
The objective is to explain how a software design may be represented as a set of interacting objects that manage their own state and operations and to introduce various models that describe an object-oriented design.
Impact of Effective Performance Appraisal Systems on Employee Motivation and ...Dr. Nazrul Islam
Healthy economic development requires properly managing the banking industry of any
country. Along with state-owned banks, private banks play a critical role in the country's economy.
Managers in all types of banks now confront the same challenge: how to get the utmost output from
their employees. Therefore, Performance appraisal appears to be inevitable since it set the
standard for comparing actual performance to established objectives and recommending practical
solutions that help the organization achieve sustainable growth. Therefore, the purpose of this
research is to determine the effect of performance appraisal on employee motivation and retention.
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2. Agenda
UML Modeling 2022 2
What will we learn
today?
• Working with Relationships
• Understanding
Aggregations, compositions,
interfaces & Realizations
3. Acknowledgements
Material for the Lectures are derived from a
variety of sources, including:
• Joseph, Schmuller. "Sams Teach Yourself
UML in 24 Hours."
• Object-Oriented and Classical Software
Engineering, Sixth Edition, WCB/McGraw-Hill,
2005 Stephen R. Schach
• UML resource page http://www.uml.org/
UML Modeling 2022 3
5. Working with
Relationships
A class describes a group of objects with:
similar properties (attributes).
Common behavior (operations)
common relationships to other objects
and common meaning (“semantics”).
Example:
employee: has a name, employee# and department;
an employee is hired, and fired; an employee works
in one or more projects.
UML Modeling 2022 5
6. Instances
An instance represents a phenomenon.
The name of an instance is underlined and can contain the class of the
instance.
The attributes are represented with their values.
Uml Modeling 2022 6
zone2price = {
{‘1’, .20},
{‘2’, .40},
{‘3’, .60}}
tarif_1974:TarifSchedule
7. Types of relationships
Relationships are basically connections between classes to fill out a
picture.
A way to related classes to one another.
Types of Relationships
Associations
Constraints on Associations
Qualified Associations
Reflexive Associations
Inheritance
Generalizations
Dependencies
Uml Modeling 2022 7
8. Association
When classes are connected conceptually, it’s called association
Associations denote relationships between classes.
Example:
Association between a player and a team.
It can be described as “A player plays on the team”
A filled triangle used to point appropriate direction of the association.
Uml Modeling 2022 8
9. Association
When one class associates with another, each one usually plays a role
within that association.
You can show each class’s role by writing it near the line next to the
class.
Or
Uml Modeling 2022 9
10. Constraints on Association
Sometimes an association between 2 classes must follow a rule. That
rule is called Constraint.
It is indicated by putting a constraint near the association line.
Example
A bank teller serves a customer. But each Customer is served in the order
in which he/she appears in the line. That’s a constraint.
Uml Modeling 2022 10
11. Constraints on Association
Another type of constraint is the (or) relationship. Signified by (or) on a
dashed line that connects 2 association lines.
Example
A high school student choosing either an academic course of study or a
commercial one as shown in figure.
Uml Modeling 2022 11
12. Association Classes
When an association have attributes and operations, just like a class, It’s
called association class.
It is visualized in the same way as a regular class and a dashed line is
used to connect it to the association line.
Uml Modeling 2022 12
13. Multiplicity of Association
The number of objects from one class that relate with a single object in
an associated class.
The ability to show how many objects are involved in the association.
One class can relate to another class in many relationships. That are
One-to-one relationship
One-to-many relationship
Many-to-one relationship
Many-to-many relationship
Uml Modeling 2022 13
14. UML classes and association in MHC-
PMS
UML Modeling 2022 14
16. Qualified
Associatio
n
A qualified association has a qualifier that is
used to select an object (or objects) from a larger
set of related objects, based upon the qualifier
key. Informally, in a software perspective, it
suggests looking things up by a key, such as
objects in a HashMap.
Example
For example, if a ProductCatalog contains
many ProductDescriptions, and each one can be
selected by an itemID
Uml Modeling 2022 16
17. Reflexive
Associatio
n
When a class is in an association with itself, it’s
called Reflexive association.
When a class have object that plays a variety of
roles.
For example, A carOpponent can be either a driver
or a passenger.
Uml Modeling 2022 17
18. Inheritance
One class can inherit attributes and operations from another class (Super
class).
Uml Modeling 2022 18
An inheritance hierarchy in an animal kingdom
19. Generalization
Generalization is an everyday technique that we use to manage complexity.
Rather than learn the detailed characteristics of every entity that we experience,
we place these entities in more general classes (animals, cars, houses, etc.) and
learn the characteristics of these classes.
This allows us to infer that different members of these classes have some common
characteristics e.g., squirrels and rats are rodents.
In modeling systems, it is often useful to examine the classes in a system to see if
there is scope for generalization. If changes are proposed, then you do not have to
look at all classes in the system to see if they are affected by the change.
Uml Modeling 2022 19
20. Generalization
In object-oriented languages, such as Java, generalization is implemented using the
class inheritance mechanisms built into the language.
In a generalization, the attributes and operations associated with higher-level
classes are also associated with the lower-level classes.
The lower-level classes are subclasses inherit the attributes and operations from
their super classes. These lower-level classes then add more specific attributes and
operations.
Uml Modeling 2022 20
26. Aggregation
A class consists of number of component classes. That special type of
relationship is called Aggregation.
Components and classes are in part-whole association.
Represented by a line between component and the whole with an open
diamond adjoining the whole.
Weak type of association.
Example:
A home computer system is an aggregation that’s consists of a CPU box, a
keyboard, a monitor, a CD-ROM drive, a modem, one-or-more hard drives,
a disk driver, printer and some speakers.
Uml Modeling 2022 26
29. Constraints on Aggregation
Sometimes set of possible components in an aggregation fall into an Or
relationship.
For example, in a restaurant a meal consists of salad or soup along with
main course and desert.
To model such problem, you will use a constraint representing with a
dotted line connecting two part-whole lines.
Uml Modeling 2022 29
30. Composites
A strong type of aggregation.
Each component can belong to just one whole.
For example, the composites of coffee table are the tabletops and the
legs, makes a composition.
Represented by a line between component and the whole with a filled
diamond.
Uml Modeling 2022 30
31. Composite
Structure
Diagram
One way to show components of class is
composition. However, if we want to show
internal structure of class, we use
composite structure diagram using
UML2.0
Uml Modeling
2022 31
32. Composite Structure Diagram
Example:
Suppose you are creating a
model of a shirt.
The composite structure
diagram focuses on the shirt
and its internal structure.
Uml Modeling 2022 32
33. Interfaces and Realizations
An interface is a set of operations
that specifies some aspect of a
class’s behavior and it’s a set of
operations that a class present to
other classes.
Class rectangle symbol that
contains the keyword «interface».
2022 Uml Modeling 33
Symbol
34. Interface
Example:
Every time you use a washing machine,
you don't rip it apart to get to the underlying
circuitry so that you can turn it on and set
the time parameters. You get the washing
machine to perform those operations by
turning a control knob.
The control knob, an interface to a
washing machine, allows you to get the
washing machine to carry out some of the
washing machine's operations
Another way to represent a class and an
interface is with a small circle connected by
a line to the class.
Uml Modeling 2022 34
35. Realization
The realization is a relationship between two objects, where the
client (one model element) implements the responsibility specified
by the supplier (another model element).
The realization relationship can be employed in class diagrams
and components diagrams.
The realization relationship does not have names.
It is represented by a dashed line with a hollow arrowhead at one
end that points from the client to the server.
Interface Realization
Interface realization is a kind of specialized relation between the
classifier and the interface. In interface realization relationship,
realizing classifiers conforms to the contract defined by the
interface.
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36. Inheritance vs Realization
Inheritance
Inheritance is like a relationship
between a parent and a child.
The parent passes on physical
attributes (eye color, hair color,
and so on) to the child, and the
child also takes on behaviors
from the parent
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Realization
Realization is something like the
relationship between a teacher
and a student
The teacher doesn't pass on any
physical attributes to the student,
but the student learns behaviors
and procedures from the teacher.
37. Interfaces Everywhere
A class can realize more than one
interface, and an interface can be realized
by more than one class.
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To model interaction with a class through its
interface, use a dependency symbol.
UML 2.0's "ball-and-socket" notation for modeling
interaction through an elided interface symbol.
38. Interfaces and ports
A port is an access point that
the mouse plugs into.
Your computer also has a
serial port, a parallel port, and
one or more USB ports.
These ports are the points
through which the computer
interacts with its environment.
In the figure the port symbol
is a small square on the
border of the class icon, and
the square is connected to
the interface.
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39. Visibility
Visibility applies to attributes or
operations and specifies the extent to
which other classes can use a given
class's attributes or operations (or an
interface's operations).
Three levels of visibility are possible.
1. At the public level, usability extends
to other classes.
2. At the protected level, usability is
open only to classes that inherit
from the original class.
3. At the private level, only the original
class can use the attribute or
operation.
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40. Scope
Scope is another concept relevant to attributes and operations and how
they relate across a system.
Two kinds of scope are possible.
1. In instance scope, each instance of a class has its own value for the
attribute or operation.
2. In classifier scope, only one value of the attribute or operation exists
across all instances of the class.
A classifier-scoped attribute or operation appears with its name underlined.
This type of scoping is usually used when a specified group of instances
(and no others) must share the exact values of a private attribute. Instance
scoping is by far the more common type of scope.
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How to represent.
Many to many: For example, a many-to-many relationship exists between customers and products: customers can purchase various products, and products can be purchased by many customers.