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UML Tutorial
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UML is a standard language for specifying, visualizing, constructing, and documenting
the artifacts of software systems.
UML was created by Object Management Group and UML 1.0 specification draft was
proposed to the OMG in January 1997. This tutorial gives an initial push to start you
with UML. For more detail kindlycheck tutorialspoint.com/uml
UML is a standard language for specifying, visualizing, constructing, and documenting the
artifacts of software systems.
UML was created by Object Management Group (OMG) and UML 1.0 specification draft was
proposed to the OMG in January 1997.
OMG is continuously putting effort to make a truly industry standard.

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UML stands for Unified Modelling Language.UML is different from the other common programming languages like C++, Java,
COBOL etc.
UML is a pictorial language used to make software blue prints.

So UML can be described as a general purpose visual modelling language to visualize, specify,
construct and document software system. Although UML is generally used to model software
systems but it is not limited within this boundary. It isalso used to model non software systems
as well like process flow in a manufacturing unit etc.
UML is not a programming language but tools can be used to generate code in various
languages using UML diagrams. UML has a direct relation with object oriented analysis and
design. After some standardization UML is become an OMG (Object Management Group)
standard.

Goals of UML:
A picture isworth a thousand words, this absolutely fits while discussing about UML. Object
oriented concepts were introduced much earlier than UML. So at that time there were no
standard methodologies to organize and consolidate the object oriented development. At that
point of time UML came into picture.
There are a number of goals for developing UML but the most important is to define some
generalpurpose modelling language which all modelers can use and also it needs to be made
simple to understand and use.
UML diagrams are not only made for developers but also for business users, common people
and anybody interested to understand the system. The system can be a software or non
software. So it must be clear that UML is not a development method rather it accompanies with
processes to make asuccessful system.
At the conclusion the goal of UML can be defined as a simple modelling mechanism to model all
possible practical systems in today.s complex environment.

A conceptual model of UML:
To understand conceptual model of UML first we need to clarify What is a conceptual model? and
Why a conceptual model is at all required?

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A conceptual model can be defined as a model which is made of concepts and their
relationships.
A conceptual model is the first step before drawing a UML diagram. It helps to
understand the entities in the real world and how they interact with each other.

As UML describes the real time systems it is very important to make a conceptual model and
then proceed gradually. Conceptual modelof UML can be mastered by learning the following
three major elements:

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UML building blocks
Rules to connect the building blocks
Common mechanisms of UML

Object oriented concepts:
UML can be described as the successor of object oriented analysis and design.
An object contains both data and methods that control the data. The data represents the state
of the object. A classdescribes an object and they also form hierarchy to model real world
system. The hierarchy is represented as inheritance and the classes can also be associated in
different manners as per the requirement.
The objects are the real world entities that exist around us and the basic concepts like
abstraction, encapsulation, inheritance, polymorphism all can be represented using UML.
So UML is...