Consistencies in Fuzzy Spatiotemporal XML Updating

Researches on spatiotemporal data based on XML has received increasing attention due to that XML has a lot of advantages such as extensibility and flexibility. Although XML has been employed to model and handle spatiotemporal data, relatively little work has been carried out to further investigate the consistencies of spatiotemporal data, especially fuzzy spatiotemporal data in XML documents. In this chapter, first a fuzzy spatiotemporal data model has been proposed, and then the structure of fuzzy spatiotemporal data in XML document is presented. After studying consistency conditions for fuzzy spatiotemporal data in XML documents, how updating operations, inserting operations, and deleting operations effect on consistencies of fuzzy spatiotemporal data in XML documents are demonstrated. Furthermore, the algorithm fixing these inconsistencies is presented. After investigating several characteristics of the three primitive changing operations on the fuzzy spatiotemporal data model, the performances of inconsistency fixing time are evaluated.