BoUML中UML的ReadVariableAction的语义是什么？ [英] What is the semantics of UML's ReadVariableAction in BoUML?

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:

A VariableAction operates on a statically-specified Variable. The Variable must be one that is defined either by an Activity (see sub clause 15.2) or a StructuredActivityNode (see sub clause 16.11) containing the VariableAction.

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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