Introduction of UML.正如前面曾提到过的，UML的本意是要成为一种标准的统一语言，使得IT专业人员能够进行计算机应用程序的建模。UML的主要创始人是Jim Rumbaugh、Ivar Jacobson和Grady Booch，他们最初都有自己的建模方法（OMT、OOSE和Booch），彼此之间存在着竞争。最终，他们联合起来创造了一种开放的标准。（听起来是不是很熟悉？这个现象类似J2EE、SOAP和Linux的诞生。）UML成为"标准"建模语言的原因之一在于，它与程序设计语言无关。（IBM Rational的UML建模工具被广泛应用于J2EE和.NET开发。）而且，UML符号集只是一种语言而不是一种方法学。-Introduction of UML. As I have mentioned, UML is intended to become a standard uniform language, enable IT professionals to conduct computer modeling applications. UML is the main founder Jim Rumbaugh and Ivar Jacobson and Grady Booch, they first have their own method of modeling (OMT, and Booch exp), the mutual competition between the existence. Eventually, they join together to create an open standard. (Does not sound very familiar? This phenomenon similar to J2EE, SOAP and Linux was born.) UML has become the "standard" language modeling one of the reasons is that it has nothing to do programming language. (IBM Rational UML modeling tools are widely used J2EE and.NET development.) Moreover, the UML symbols set only one language and not a methodology.