uml s extension mechanism uml扩展机制
Using the UML extension mechanism, the standard sequence diagram is extended.
运用UML扩展机制，对标准的顺序图进行了扩充。
It is basically an extension mechanism that broadens the vocabulary of the UML and provides more specific meaning.
它主要是一种扩展机制，能够拓宽uml的语法，提供更明确的涵义。
Furthermore, it is totally useless because UML provides the extension mechanism (stereotypes and tags) to address this need.
此外，这样做也毫无意义，因为UML提供了扩展机制(构造型和标签)来应付这类要求。
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