中文摘要：

PLML是描述人机交互模式的一个重要工具,然而它还存在一些缺点。其中一个重要的缺点是它的【implementation】元素并未明确定义,从而造成了它所描述的设计模式在基于模型的用户界面开发方法中难以自动化或半自动化地应用。针对这一问题,设计了PLML的【implementation】元素的XML Schema,明确给出了该元素的形式化的描述方法。通过一个实例研究,验证了其在基于模型的用户界面开发中可以起到积极的作用。这一方法也可推广到其它的基于XML的模式描述语言中

英文摘要：

PLML is an important tool for the description of user interface, but it exist some shortcomings. One of the important shortcomings is that itselement don’t be define clearly, which causes the problem that it is difficult for the design pattern it describes to apply automatic or semi-automatic in model-based user interface development. Aiming at this problem, the XML Schema for theelement of PLML was designed. In the schema, this element’s formal description method was specifically given. By a case study, it is proven that this method could have an active function in model-based user interface development. This method can also apply to the others pattern description languages.