时空XML文档中不一致性修正方法的研究

Research on Fixing Inconsistencies in Spatiotemporal XML Document

作为时空数据库的核心和基础,许多时空数据模型被提出以适应越来越多的应用.基于XML对时空数据建模的研究特别是修正时空数据在XML文档中的不一致性的研究还很少.首先,提出了一个基于XML的时空数据模型,并在此模型的基础上给出了时空数据在XML文档中的一致性条件.然后,对三种主要的变化操作即更新操作、插入操作和删除操作中的不一致性阐述了修正方法,并给出了相应的例子说明.最后,对这三种操作不一致性种类进行了讨论.

As being the core and the base of spatiotemporal database,a considerable amount of spatiotemporal data models have been proposed to enable the increasing applications.However,less research has been done in modeling spatiotemporal data based on XML,especially in fixing inconsistencies of spatiotemporal data in XML document.A spatiotemporal data model based on XML was established.On the basis of the model,consistency conditions of spatiotemporal data in XML document were given.In succession,how to fix inconsistencies of the three primitive change operations,namely update,insert,and delete,were demonstrated. Subsequently,examples were given to illustrate approaches for fixing inconsistencies.Finally,types of inconsistencies of the three primitive change operations were discussed.