具有不确定数据的XML数据编码设计

为了解决模糊数据对XML文档中各元素造成的内容和结构上的改变,使得XML数据模型中的不确定信息能够被有效地管理,提出了一种基于前缀编码的四元组编码方案.在语法分析器XML Schema中,根据模糊数据的特征,利用增加的元素对XML文档中的模糊元素进行约束,进而为每一个元素建立一个四元组,其参数由文档号、遍历序号、元素模糊性及组内标志符构成.通过大量的实验对比分析,验证了该编码方案的有效性,其更适用于具有较低XML树高度的XML文档.

Design for XML data encoding with uncertain data

In order to solve the change in both content and structure of each element in the XML document caused by fuzzy data and make the uncertain information be effectively managed in the XML data model, a quadruple encoding scheme based on the prefix encoding was proposed. In the syntactic analyzer XML Schema, the fuzzy elements were restrained with some added elements according to the characteristics of fuzzy data, and then each element could be created with a quadruple, where the parameters were consisted of document number, traversal number, element fuzziness and mark in group. Though the contrast and analysis for a great amount of experiments, the effectiveness of this encoding scheme is proved. The results show that the proposed coding scheme is more suitable for XML document with lower height of XML tree.