中文摘要：

设计了一种Petri网建模工具。针对该工具的特点定义了一种新的分层体系结构——对称三层架构,采用该架构设计了该工具的体系结构和核心类;对该工具进行了验证。结果表明：通过该工具,可以以图形化的方式建立、分析和仿真Petri网模型。

英文摘要：

A Petri net modeling tool is designed. According to characteristics of tool,a new layered architecture,symmetrical three-tier architecture,is defined; and architecture and core classes of tool is designed by this architecture; and this tool is validated. The results show that Petri net models can be graphically built,analyzed and simulated by this tool.