J. Stuller et al. (Eds.): ADBIS-DASFAA 2000, LNCS 1884, pp. 142--156, 2000.
Popular Tags
No tags have been applied to this document.
BibTeX | Add To MetaCart
author = {Springer-Verlag Berlin Heidelberg and Sanjay Kumar Madria and Bharat Bhargava and Evaggelia Pitoura and Vijay Kumar},
title = {J. Stuller et al. (Eds.): ADBIS-DASFAA 2000, LNCS 1884, pp. 142--156, 2000.},
journal = {ADBIS-DASFAA, LNCS},
year = {},
volume = {1884},
pages = {142--156}
}
Bookmarks
OpenURL
Abstract:
We consider queries which originate from a mobile unit and whose result depends on the location of the user who initiates the query. Example of such a query is How many people are living in the region I am currently in?" We execute such queries based on location-dependent data involved in their processing. We build concept hierarchies based on the location data. These hierarchies define mapping among different granularities of locations. One such hierarchy is to generate domain knowledge about the cities that belong to a state. The hierarchies are used as distributed directories to assist in finding the database or relation that contains the values of the location-dependent attribute in a particular location. We extend concept hierarchies to include spatial indexes on the location-dependent attributes. Finally, we discuss how to partition and replicate relations based on the location to process the queries efficiently. We briefly discuss the implementation issues.
