通常用系统顺序图来画一个用例场景(例如主场景或复杂的常用的场景)。 1、首先要画一个system,前面要加个冒号,不写system,扣全部分,不写冒号扣1分,位置放错扣1分。 因为要画的是系统事件,没有系统还画什么 2、顺序:最左边是actor(前面也要加冒号),然后是system,然后就是用例的外部实体 3、通常只要求描述一...
A repetition or loop within a sequence diagram is depicted as a rectangle. Place the condition for exiting the loop at the bottom left corner in square brackets [ ]. Back to top Synchronous Message A synchronous message requires a response before the interaction can continue. It's usually draw...
opt Optional: the fragment executes only if the supplied condition is true. Equivalent to an alt only with one trace. par Parallel: each fragment is run in parallel. loop Loop: the fragment may execute multiple times, and the guard indicates the basis of iteration. region Critical region: th...
Example:SequenceDiagram c:client<<create>>:TicketAgentsetItinerary(i)p:planningAssistant calculateRoute()route<<destroy>>notify()6 SequenceDiagrams •X-axisisobjects –Objectthatinitiatesinteractionisleftmost–Objecttotherightareincreasinglymoresubordinate •Y-axisistime –Messagessentandreceivedareordered...
21 The messages may be synchronous (shown with a solid arrowhead), asynchronous (shown with an open arrowhead), or flow (shown with a dashed arrow line). Time on a sequence diagram flows, more or less, from the top of the page downwards. Additionally, state or condition of the lifeline...
Sequence Diagrams show elements as they interact over time and they are organized according to object (horizontally) and time (vertically) 水平方向是角色,竖直方向是时间,这些元素交互是基于时间的 参考:https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-sequence-diagram/ ...
A UML sequence diagram shows how a set of objects interact in a process over time. It shows the messages that pass between participants and objects in the system, and the order in which they occur.WindowsWebTo build a sequence diagram, use a UML Sequence template or starter diagram,...
sequence diagram顺 图,循 图;程 表 temporal sequence时间 列;时间程 ,时间层 sedimentary sequence沉积层 operating sequence操作程 ;操作顺 random sequence随机列 positive sequence正 英语例句库 1.He had to attend asequenceof meetings. 他得参加一系列会议。
A Sequence Diagram is one such type of diagram that can be designed with UML. As you can guess from its name, the Sequence diagram shows the order in which interactions take place. The diagram is used to depict the interaction between several objects in a system. ...
You must have a sequence diagram open that contains at least one combined fragment with multiple lifelines. Procedure In the diagram editor, right-click an interaction operand that has no existing guard condition; then clickInteraction Operand>Add a guard condition. ...