Th e U L Exten sion M ech an ism Introduction There is - PDF document

in todayÕs organisations to be agile and responsive bystrategically capturing, of awide range of system intensive processes. It promotes a use case driven, architecturecentric, iterative and incremental process, which is object oriented and component-based. The UML is broadly applicable to different from that elementÕsspecification. For example, let us consider association, which in its most simplenotation consists of This is a the UML by addingnew building blocks, creating new properties, and specifying new semantics in orderto make the language suitable for your specific problem domain. There are threecommon extensibility mechanisms that are defined by the UML: stereotypes, taggedvalues, and constraints.StereotypesStereotypes allow you to extend the vocabulary you might need to have symbols forrepresenting routers and hubs. By using stereotyped nodes you can make these thingsappear as primitive building blocks.As another example, let us consider exception classes in Java or C++, which youmight sometimes have to model. Ideally you would only want to allow them to bethrown and caught, nothing else. youmake them appear as basic building blocks.Stereotypes also allow you to introduce new graphical symbols for where the keywords are attributes. They allow that a tagged value is not equal to a class attribute. Instead, youcan regard a tagged value as being a metadata, since its value applies to the elementitself and not to its instances.One of the most common uses of a tagged value is to specify properties that arerelevant to code generation or configuration management. So, for example, you canmake use of a tagged value in order to specify the programming language to whichyou map a particular class, or values can be useful, consider the release teamof a to keep track of the version number and test results foreach main subsystem, and so one way of adding this information to the models is touse tagged values.Graphically, a tagged value is rendered as a string enclosed by brackets, which isplaced below the visualise, construct, and document theelements of a software-intensive system. However, there will be circumstances whereyou might want to colour outside the lines, i.e. bend or extend the modelling languagein order to shape and grow it to the specific needs of your project.PortfolioBankAccount{secure} extension mechanisms that allow you to do for the knowledge and experiences of the individuals within adevelopment culture such that the culture can evolve. They might not meet every needthat arises within the development of a project, but they do accommodate a largeportion of the tailoring and customising deviates substantially from the standard form of the UML and that by some interoperability problems. For this reason, it isessential to