面向对象型数据库是数据库发展的一个必然趋势,在GIS中面向对象的空间数据库技术更显突出。介绍了Petri网的原理与空间数据库概念设计的传统方法,提出了基于Petri网的面向对象型空间数据库概念设计模型,并把模型图映射到对象?关系数据表中。
It is a inevitable trend for the development technology, especial in GIS. The principl of Petri net and the spatial database are introduced and the concep nets is presented, in which the model diagram can td be of database which is bulit with object-oriented database the traditional methods of the concept design model for esign model of object-oriented spatial database based on Petri mapped into the data tabulation of object-relationship .