RSA can provide visual UML modeling, the ability to specialize in UML semantics with profiles, and the ability to transform the model to another model or to runtime artifacts.
RSA能够提供可视化的UML建模，利用概要文件使之适应UML语义的能力，以及从一种模型转换到另一种模型的能力。
Activiti takes a different tact, choosing instead to embrace BPMN 2.0, which specifies both execution semantics, as well as the visual description of a process.
Activiti采取的是另一种方式，它使用了BPMN 2.0，后者定义了执行语义和可视化的流程描述。
A DSL is a language, that is, a collection of sentences in a textual or visual notation with a formally defined syntax and semantics.
DSL是一种语言，也就是说，它是由文本或图形标记构成的语句的集合，有着正式定义的语法和语义。
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