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.

• 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。