关键词: 可扩展标示语言（XML）, 不确定性, 多维空间, 概率模型, 关联事件

Abstract: Uncertainty of mass data storage and recording and the extensive application of XML in the extension make that the XML association event probability data model has become a hot topic. Based on the existent probability models, this article describes the complex event probabilistic data model, and puts forward the conception of multidimensional uncertainty probability model space. Furthermore, the paper unifies modeling?of?multiple?probability models, and extends the single dimension XML probability node to multidimensional space, and then defines the uniform spatial query, provides a new theory method of modeling and query optimization of complex probabilistic data model.

Key words: Extensive Markup Language（XML）, uncertainty, multi-dimensional space, probability model, related events