vxg meaning in Chinese

固封极柱

Xrdbm improves xml - dbms at following aspects : the consistency maintaining method during transforming semi - strctured data model into relation model , the maintenance of xml document and the problem of different subelements with the same name , etc . based on xrdbm , the author proposes an algorithm of xml publishing to deal with the input sql statements and generate valid xml document for the certain dtd automatically , named valid xml generating from sql ( vxg - sql )
Xrdbm对xml - dbms进行了如下改进和完善，包括dtd生成关系模式中常见的子元素重名、 xml文档在关系数据库中的维护、关系模式和半结构化模型之间映射的一致性维护方法等。在xrdbm基础之上，作者设计并实现了根据sql语句自动生成符合dtd 、满足一致性约束的xml文档的算法vxg - sql 。