【摘要】 概率数据模型研究已受到广泛关注,但对于多数据源情况下的概率数据管理却缺乏研究,在已有模型的基础上,提出了一种扩展的基于XML的概率数据模型,使概率查询操作不再局限于模型内部,而是充分利用各数据源自身的信用度及规模等信息,支持多个XML概率数据文档间的归并与查询,此外该模型还解决了用XML表示概率数据所引入的数据依赖问题.更多还原

【Abstract】 The research on the probabilistic data model has received extensive attentions except for the management of probabilis-tic data from various data sources.An extended XML probabilistic data model was proposed based on an existent model.This new model is no longer confined to evaluate query operation in the internal model.Instead,it makes full use of the data sources’own credit degrees,size and other information to support query and merging operations between different XML documents.Moreover,the data dependent problem caused by importing probability in XML was also resolved in the new model.更多还原