free uml sequence diagram tool

I. Purpose For a development team, the sequence diagram is very important because it is used to describe the interaction between a group of objects in the system, especially for crawlers. The project and sequence diagram of business complexity allow us to clarify these complex processes more quickly. Ii. Basic

. Note: The door in "Top level diagram" uses the message arrow to point to the reference fragment, where it is not necessary to draw it as a block.??Partial decompositionAn object can draw multiple lifelines so that messages inside and between objects are displayed on the same graph.State Constants/ContinuationsThe state constant is the constraint of the lifeline, and the runtime is always true. A rectangle displayed as a semicircle on both sides, suc

This article begins with a discussion of code-level issues. The main feature of Markdown is the design implementation.This article begins with the markdown perimeter code:UML sequence diagrams are obtained from https://github.com/bramp/js-sequence-diagrams copy.When this UML code also uses two JS, function library and drawing.First of all, talk about this JS core

understand the component: Class Component Logical Abstraction Physical Abstraction You can directly own properties and operations Generally, you only have operations that can be queried through the interface. To sum up, components have the following features: The component is physical. Component is replaceable Components are part of the system The component follows a group of interfaces and provides implementation for a group of interfaces. Compared wi

diagram.The following fragment types can be used to change this interpretation: Fragment type Name Description Consider Consider Specifies the list of messages described by this fragment. Other messages can occur on a running system, but this is not a very meaningful description.Type the list in the Messages property. Ignore Ignore A list of messages not described in this fragment. These messages can occur in a running syst

diagram.The following fragment types can be used to change this interpretation: Fragment type Name Description Consider Consider Specifies the list of messages described by this fragment. Other messages can occur on a running system, but this is not a very meaningful description.Type the list in the Messages property. Ignore Ignore A list of messages not described in this fragment. These messages can occur in a running syst

diagram.The following fragment types can be used to change this interpretation: Fragment type Name Description Consider Consider Specifies the list of messages described by this fragment. Other messages can occur on a running system, but this is not a very meaningful description.Type the list in the Messages property. Ignore Ignore A list of messages not described in this fragment. These messages can occur in a running syst

) operator to explain that the interactive box will think that this information is unimportant, so ignore them (directly do not draw it out), or you can use the consider (emphasis) operator to explain that the interactive box that only this information is important, and therefore will show them. Ref (Reference) Used to point to an interactive situation as defined in another diagram. We'll make it a box that covers the lifeline of th

relationship that is represented in UML with a solid line with arrows pointing to the contained class. In the you may find that there are 1 online. 1, this is a description of the inclusion relationship. There are several types of UML classes.1..1 表示另一个类的一个对象只与该类的一个对象有关系0..* 表示另一个类的一个对象与该类的零个或多个对象有关系1..* 表示另一个类的一个对象与该类的一个或多个对象有关系0..1 表示另一个类的一个对象没有或只与该类的一个对象有关系* 任意多个对象关联Aggregation (Aggregation) relationshi