Continuous Queries within an Architecture for Querying XML-Represented Moving Objects

The development of spatiotemporal database systems is primarily motivated by applications tracking and presenting mobile objects. Another important trend is the visualization and processing of spatial data using XMLbased representations. Such representations will be required by Internet applications as well as by location-based mobile applications. In this paper, an architecture for supporting queries on XML-represented moving objects is presented. An important requirement of applications using such an architecture is to be kept informed about new, relocated, or removed objects fulfilling a given query condition. Consequently, the spatiotemporal database system must trigger its clients by transmitting the required information about the relevant updates. Such queries are called continuous queries. For processing continuous queries, we have to reduce the volume and frequency of transmissions to the clients. In order to achieve this objective, parameters are defined, which model technical...

• Type: Conference
• Year: 2001
• Where: SSD
• Authors: Thomas Brinkhoff, Jürgen Weitkämper
• Keywords: Continuous Queries, Database, Database System, Spatiotemporal Database, SSD 2001