Abstract: To clearly represent product knowledge and its semantics and constraints，smantic-based product knowledge representation method is proposed，in which，product knowledge is represented by Semantic Object Semantic Networks（SOSNs）.SOSNs are based on graph and combining with object-oriented techniques.In SOSNs，nodes represent product semantic objects and directed arcs represent the relationships among nodes.SOSNs can better express product structure，semantic relations，configuration management and constrains.SOSNs make it easy to manage all kinds of knowledge during product development process and help to organize，manage，share and reuse product knowledge.

Key words: Semantic Object Semantic Networks（SOSNS）, knowledge representation, product design

摘要： 为表达产品知识及其语义内涵和约束关系，提出采用语义对象网络模型（Semantic Object Semantic Networks，SOSNs）表达产品知识。SOSNs是基于图并结合面向对象方法表达的知识模型，其中节点表示产品语义对象，有向边显性定义语义对象之间的语义关系，这种基于图的语义模型能够清晰的表示产品功能、行为、原理、结构、配置管理、约束等知识及其语义关系，将与产品开发相关的知识集成为一个逻辑整体，形成分层的结构化语义对象网络结构，便于组织和管理产品知识，易于实现知识的共享和重用。

关键词: 语义对象网络模型, 知识表达, 产品设计