基于键的XML模式到关系模式的规范化转换

本文针对XML模式向关系模式转换过程中形成的冗余和不规范，提出一种基于XML键的XML模式到关系模式的规范化转换算法。该算法以键为基础，根据XML函数依赖的一组推理规则，扩充函数依赖的集合，避免XML模式向关系模式转换过程中语义丢失的情况；再利用一组消解规则，消除冗余的函数依赖，使其满足极小函数依赖集；最后以键为中心划分关系属性，得到关系表，并且保证得到的关系模式满足3NF。

Translating XML to Normal Relational Schema Based on XML Key

This paper proposes a Normalized Translation Algorithm for translating XML to relational schema based on XML key, which tackles the redundancy and un-standard expression in the translation. According to a group of deduce rules about XML functional dependency, we expand the FD-Set to avoid losing semantics of original XML. Then we use a group of clear rules to clear up the redundant FD and enable the final FD-Set is minimum. Finally, we take the XML keys as the center to divide the relation attributes, obtain the relation table, and guarantee the relation schema satisfies 3NF.