中文摘要：

从参数化系统的模型表示方法出发,分析了拓扑元素永久命名问题,探讨了解决该问题的4个基本条件及其内在关系.将拓扑元素永久命名问题分为唯一命名及其辨识问题和模型重建阶段拓扑结构发生改变时的语义辨识问题2个层面展开综述.其中,第一个层面涉及到原始名字和边界模型的关联,引用名字的构造2个问题;在第二个层面中,按照所引用的信息类型分为引用拓扑对象的几何信息和拓扑对象本身2种处理模式.对其他相关研究中的名字问题进行了概述.最后对今后研究方向进行了探讨.

英文摘要：

Based on the model representation used in 3D parametric CAD systems, four fundamental conditions to solve the persistent topological naming problem, and their internal relationships are analyzed. The persistent naming problem can be classified into two categories： how to uniquely name and retrieve topological entities, and how to retrieve topological entities as the topological structure of the B-rep model is changed during the re-evaluation process. The first category includes two aspects： how to associate the original name with the B-rep model, and how to construct the reference name. The second category involves two processing methods according to the reference purpose： referring to the geometrical information of the entity, and referring to the entity itself. The naming problems in related domains are also summarized. Opens Issues for further research are discussed.