— In location-based, mobile continual query (CQ) systems, two key measures of quality of service (QoS) are: freshness and accuracy. To achieve freshness, the CQ server must perfo...
Abstract. Although a number of methods have been proposed to process exact match or range queries in P2P network, very few attention has been paid on spatial query process. In this...
Abstract. Algorithms for processing Structural Joins embody essential building blocks for XML query evaluation. Their design is a difficult task, because they have to satisfy many ...
Abstract: We propose a framework for the specification of extensible database systems. A particular goal is to implement a software component for parsing and rule-based optimizatio...
: Purpose ? Tree pattern is at the core of XML queries. The tree patterns in XML queries typically contain redundancies, especially when broad integrity constraints (ICs) are prese...
Sihem Amer-Yahia, SungRan Cho, Laks V. S. Lakshman...