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中文摘要：
国际标准 ISO 10303，叫的步，被用来在在不同电脑辅助的系统之间的产品模型和联系数据的交换处理问题。一个平台基于为管理产品信息的步被介绍。这个平台包括三个部件：一个产品几何学信息模特儿，一个产品特征模型和产品可视化当模特儿。在哪个信息从低级元素被提取到高级的，提取模式的一个信息在建立产品几何学信息模型被采用。相对元素表基于提取产品信息被创造。与穿越这些表，特征抽取方法被建议，它在产品模型利用边界信息并且避免凹度的决心和曲线的凸状。相关到特征的信息在当特征块和产品可视化模型从它被成立，说出的结构被存储。特征块在三个部件之中为信息通讯和同步更改在站台被使用。
英文摘要：
The international standard ISO 10303, called STEP, has been used to deal with problems in the exchange of product models and the associated data between different computer-aided systems. A platform based on STEP for managing product information is presented. This platform includes three components： a product geometry information model, a product feature model and a product visualization model. An information extracting pattern, in which information is extracted from low level elements to high level ones, is adopted in establishing the product geometry information model. Relative elements lists are created based on the extracted product information. With the traversing of these lists, feature extraction methods are proposed, which take advantage of boundary information in product model and avoid the determination of concavity and convexity of curves. Information correlating to features is stored in a structure named as feature block and the product visualization model is founded from it. The feature block is used in the platform for information communication and synchronous update among the three components.
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