Abstract: Data mapping is a widely used data mapping method in peer data management systems.It can improve the degree of the data share by creating a new kind of mapping skillfully.Based on a series of research，this discourse advances a data mapping inference algorism of either peer in complex path，in the process of mapping inference，makes sure of the optimum route according to optimization principle and then linear path data mapping inference to ascertain the connection of the mapping of the peer-to-peer，thereby resolves the data mapping inference of either peer in complex path.

摘要： 映射表是对等数据管理系统广泛使用的一种数据映射方法。通过巧妙地构造一种映射关系能极大地提高数据共享的程度。在系列研究的基础上，提出了一种复杂路径上任一对等点的数据映射推导算法，在映射推导过程中，根据路径优化策略确定出最优路径，对其进行线性路径数据映射推导，确定该对等点间的映射关系，从而解决了复杂路径上任一对等点的数据映射推导问题。