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Stereotype (UML)
A stereotype is one of three types of extensibility mechanisms in the Unified Modeling Language (UML), the other two being tags and constraints. They allow designers to extend the vocabulary of UML in order to create new model elements, derived from existing ones, but that have specific properties that are suitable for a particular domain or otherwise specialized usage. The nomenclature is derived from the original meaning of stereotype, used in printing. For example, when modeling a network you might need to have symbols for representing routers and hubs. By using stereotyped nodes you can make these things appear as primitive building blocks. Graphically, a stereotype is rendered as a name enclosed by guillemets (« » or, if guillemets proper are unavailable, ) and placed above the name of another element. In addition or alternatively it may be indicated by a specific icon. The icon image may even replace the entire UML symbol. For instance, in a class diagram stereotypes can b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extensibility
Extensibility is a software engineering and systems design principle that provides for future growth. Extensibility is a measure of the ability to extend a system and the level of effort required to implement the extension. Extensions can be through the addition of new functionality or through modification of existing functionality. The principle provides for enhancements without impairing existing system functions. An extensible system is one whose internal structure and dataflow are minimally or not affected by new or modified functionality, for example recompiling or changing the original source code might be unnecessary when changing a system’s behavior, either by the creator or other programmers. Because software systems are long lived and will be modified for new features and added functionalities demanded by users, extensibility enables developers to expand or add to the software’s capabilities and facilitates systematic reuse. Some of its approaches include faciliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State (computer Science)
In information technology and computer science, a system is described as stateful if it is designed to remember preceding events or user interactions; the remembered information is called the state of the system. The set of states a system can occupy is known as its state space. In a discrete system, the state space is countable and often finite. The system's internal behaviour or interaction with its environment consists of separately occurring individual actions or events, such as accepting input or producing output, that may or may not cause the system to change its state. Examples of such systems are digital logic circuits and components, automata and formal language, computer programs, and computers. The output of a digital circuit or deterministic computer program at any time is completely determined by its current inputs and its state. Digital logic circuit state Digital logic circuits can be divided into two types: combinational logic, whose output signals are dependen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Actor
An actor or actress is a person who portrays a character in a performance. The actor performs "in the flesh" in the traditional medium of the theatre or in modern media such as film, radio, and television. The analogous Greek term is (), literally "one who answers".''Hypokrites'' (related to our word for hypocrite) also means, less often, "to answer" the tragic chorus. See Weimann (1978, 2); see also Csapo and Slater, who offer translations of classical source material using the term ''hypocrisis'' ( acting) (1994, 257, 265–267). The actor's interpretation of a rolethe art of actingpertains to the role played, whether based on a real person or fictional character. This can also be considered an "actor's role," which was called this due to scrolls being used in the theaters. Interpretation occurs even when the actor is "playing themselves", as in some forms of experimental performance art. Formerly, in ancient Greece and the medieval world, and in England at the time of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robustness Diagram
The entity-control-boundary (ECB), or entity-boundary-control (EBC), or boundary-control-entity (BCE) is an architectural pattern used in use-case driven object-oriented software design that structures the classes composing a software according to their responsibilities in the use-case realization. Origin and evolution The Entity-Control-Boundary approach finds its origin in Ivar Jacobson's use-case driven OOSE method published in 1992,. It was originally called Entity-Interface-Control (EIC) but very quickly the term "''boundary''" replaced "''interface''" in order to avoid the potential confusion with object-oriented programming language terminology. It is further developed in the Unified Process, which promotes the use of ECB in the analysis and design activities with the support of UML stereotypes. Agile modelling, and the ICONIX process elaborated on top of ECB architecture pattern with robustness diagrams. Principle The ECB pattern organises the respo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Entity-control-boundary
The entity-control-boundary (ECB), or entity-boundary-control (EBC), or boundary-control-entity (BCE) is an architectural pattern used in use-case driven object-oriented software design that structures the classes composing a software according to their responsibilities in the use-case realization. Origin and evolution The Entity-Control-Boundary approach finds its origin in Ivar Jacobson's use-case driven OOSE method published in 1992,. It was originally called Entity-Interface-Control (EIC) but very quickly the term "''boundary''" replaced "''interface''" in order to avoid the potential confusion with object-oriented programming language terminology. It is further developed in the Unified Process, which promotes the use of ECB in the analysis and design activities with the support of UML stereotypes. Agile modelling, and the ICONIX process elaborated on top of ECB architecture pattern with robustness diagrams. Principle The ECB pattern organises the respon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dependency (UML)
In the Unified Modeling Language (UML), a Dependency is a relationship that shows that an element, or set of elements, requires other model elements for their specification or implementation.OMG Unified Modeling Language, Superstructure, Version 2.4.1 The element is ''dependent'' upon the independent element, called the supplier. Two or more elements in this relationship are called tuples. In the UML, this is indicated by a dashed line pointing from the dependent (or client) to the independent (or supplier) element. The arrow representing a Dependency specifies the direction of a relationship, not the direction of a process. Standard predefined dependencies UML - defined dependencies include : * «call2» UML2: The client (an operation) may call the supplier (an operation) * «create» UML2: The client (a classifier) may create instances of the supplier (a classifier) * «derive» UML2: The client (e.g., attribute value, link) may be computed from the suppli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unified Modeling Language
The Unified Modeling Language (UML) is a general-purpose, developmental modeling language in the field of software engineering that is intended to provide a standard way to visualize the design of a system. The creation of UML was originally motivated by the desire to standardize the disparate notational systems and approaches to software design. It was developed at Rational Software in 1994–1995, with further development led by them through 1996. In 1997, UML was adopted as a standard by the Object Management Group (OMG), and has been managed by this organization ever since. In 2005, UML was also published by the International Organization for Standardization (ISO) as an approved ISO standard. Since then the standard has been periodically revised to cover the latest revision of UML. In software engineering, most practitioners do not use UML, but instead produce informal hand drawn diagrams; these diagrams, however, often include elements from UML. History Before UML 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keyword (computer Programming)
Keyword may refer to: Computing * Keyword (Internet search), a word or phrase typically used by bloggers or online content creator to rank a web page on a particular topic * Index term, a term used as a keyword to documents in an information system such as a catalog or a search engine * Keyword advertising, a form of online advertising * Keyword clustering, a search engine optimization technique * A reserved word in a programming language Other * Keyword (linguistics), word which occurs in a text more often than we would expect to occur by chance alone * Keyword (rhetoric) Keywords are the words that academics use to reveal the internal structure of an author's reasoning. While they are used primarily for rhetoric, they are also used in a strictly grammatical sense for structural composition, reasoning, and compre ..., a word that academics use to reveal the internal structure of an author's reasoning * '' Keywords: A Vocabulary of Culture and Society'', 1973 non-fiction book ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
