quartz/content/notes/what-are-uml-diagrams.md

title	aliases	tags
what-are-uml-diagrams		info201

A standard set of model constructs and notation defined by the object management group

specify what not how

• activity diagrams
  • high level for business prcesses workflows
  • low level for dtailed business logicP
• advantages
  • describe workflows
  • specify relative processing rder of activites
  • simple
  • can be shown to stakeholders for checking and confirmation

enables implementation-independent specification of:

• user/system interactions
• partitioning of responsibility
• integration with larger or existing systems
• data flow and dependency
• order of operations (algorithms and processes)
• concurrent operations

1 why is is useful

• helps develop efficient effective correct designs
• better communication with project stakeholders
• gives a big picture view of the project system
• independent of specific programming languages or development processes
• de facto standard for modelling OO systems

2 what it is not

• visual modelling software
• a programming languages
• a software development process, method, or methodology

3 Types of diagram

3.1 structural

3.2 behavioural

3.3 Linked diagrams

each digram type models a dfiferenct aspect of the system many of the diagrams link to each other

• e.g., use case, sequence, activity
• e.g., object, communication

e.g.,