CIT Dept @ UPES | Sept 2013 | Unified Modeling Language - UML.

CIT Dept @ UPES | Sept 2013 |

Unified Modeling Language - UML


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• Unified Modeling Language (UML) is a standardized, general-purpose modeling language in the field of software engineering.

• UML includes a set of graphic notation techniques to create visual models of object-oriented software-intensive systems

• It was developed by Grady Booch, Ivar Jacobson and James Rumbaugh at Rational Software in the 1990s.



• It was adopted by the Object Management Group (OMG) in 1997, and has been managed by this organization ever since.

• In 2000 the Unified Modeling Language was accepted by the International Organization for Standardization (ISO) as industry standard for modeling software-intensive systems.



• Unified Modeling Language (UML) combines techniques from data modeling (entity relationship diagrams), business modeling (work flows), object modeling, and component modeling.

• It can be used with all processes, throughout the software development life cycle, and across different implementation technologies.


• The Unified Modeling Language (UML) offers a standard way to visualize a system's architectural blueprints, including elements such as:

activities actors business processes database schemas (logical) components algorithms reusable software components.



Object Modeling Techniques (OMT)


Object Modeling Techniques (OMT)

• OMT was developed by Rumbaugh in 1991 and it as an approach to software development. The purposes of modeling are:

testing physical entities before building them (simulation),

communication with customers, visualization (alternative presentation of information),

and reduction of complexity.


OMT Models• Object Model• Dynamic Model• Functional Model


OMT- Object Model• The object model represents the static and most

stable phenomena in the modeled domain.• Main concepts are classes and associations with

attributes and operations. • Aggregation and generalization (with multiple

inheritance) are predefined relationships.


OMT- Dynamic Model• The dynamic model represents a state/transition

view on the model. • Main concepts are states, transitions between

states, and events to trigger transitions. • Actions can be modeled as occurring within

states. • Generalization and aggregation (concurrency)

are predefined relationships.


OMT- Functional Model• The functional model handles the process

perspective of the model, corresponding roughly to data flow diagrams.

• Main concepts are process, data store, data flow, and actors


Difference between the UML model and the set of diagrams of a system


UML Model <vs> Other Diagrams

• It is important to distinguish between the UML model and the set of diagrams of a system.

• A diagram is a partial graphic representation of a system's model.

• The model also contains documentation that drives the model elements and diagrams (such as written use cases).


UML Model• Unified Modeling Language (UML) Models

represent systems at different levels of detail. Some models describe a system from a higher, more abstract level, while other models provide greater detail.

• UML models contain model elements, such as actors, use cases, classes, and packages, and one or more diagrams that show a specific perspective of a system.


UML Model• A model can also contain other, more

detailed models.


UML Model• You can use modeling diagrams to capture

system use cases in a use-case model during the requirements gathering phase.

• you define the application domain in an analysis model during the system analysis phase, and you refine the application model in a design model during the detailed design phase.


• There are three important type of UML modelings:– Structural Modeling– Behavioral Modeling– Architectural Modeling


Structural Modeling• Structural modeling captures the static

features of a system..• It consists of..

₪Classes diagrams₪Objects diagrams₪Deployment diagrams₪Package diagrams₪Composite structure diagram₪Component diagram


Behavioral Modeling• Behavioral model describes the interaction

in the system.• It represents the interaction among the

structural diagrams.• Behavioral modeling shows the dynamic

nature of the system.


Behavioral Modeling• It consist of the following:

Activity diagramsInteraction diagramsUse case diagrams


Architectural Modeling• Architectural model represents the overall

framework of the system. • It contains both structural and behavioral

elements of the system. • Architectural model can be defined as the

blue print of the entire system. • Package diagram comes under

architectural modeling.


Reference Web Link www.safaribooksonline.com

• http://my.safaribooksonline.com/book/software-engineering-and-development/9780750661232/front-cover/cover

CIT Dept @ UPES | Sept 2013 | Unified Modeling Language - UML.

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