BoUML中UML的ReadVariableAction的语义是什么？

问题描述

BoUML中的

ReadVariableAction活动动作允许选择一个类及其属性，并通过创建输出图钉来返回该属性（请参见下图和

但是什么是该动作的语义？

根据

但是BoUML既不允许为活动创建变量，也不允许将变量名传递给ReadVariableAction

似乎我可以使用ReadVariableAction，如下所示

但是从UML的角度来看这是错误的模型。

解决方案

读/写/的语义清除/添加/删除BoUML中的变量操作是...错误！

很显然，当我在BoUML中添加活动时，我误解了这一部分，要理解的规范涉及活动或结构化活动节点的变量。因此，由于错误，我允许选择的变量是类的属性。另一个结果是，您无法为活动或结构化活动节点定义变量。

Mea culpa

ReadVariableAction activity action in BoUML allows to choose a class and its attribute and returns the attribute through creation of output pin (see figure below and BoUML documentation):

But what is the semantic of that action? What does ReadVariableAction operation actually return?

According to clause 16.9.3.1 Variable Action of The Unified Modeling Language Specification Version 2.5:

Clause 15.2.2 Abstract Syntax below says that Variable subsets ownedMember, so the variable should be identifiable by name.

But BoUML neither allows creation of variables for an activity nor passing a name of a variable to ReadVariableAction.

It seems that I could use ReadVariableAction as shown below

But it's wrong model from UML's point of view.

解决方案

The semantic of the read/write/clear/add/remove variable actions in BoUML is ... wrong !

Clearly I misunderstood that part when I added the activities in BoUML, I didn't read well the norm to understood that concerns variable of the activity or a structured activity node. So by error the 'variable' I allow to choose is an attribute of a class. An other consequence is you cannot define variables for an activity nor structured activity node.

Mea culpa

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