638 search results - page 52 / 128 » Efficient algorithms for evaluating xpath over streams |
IJCAI
2003
13 years 10 months ago
2003
Information integration systems provide a uniform query interface to a set of sources. One of the key challenges for an information integration system is to provide maximally comp...
SIGMOD
2009
ACM
14 years 9 months ago
2009
ACM
Enabling keyword queries over relational databases (KQDB) benefits a large population of users who have difficulty in understanding the database schema or using SQLs. However, sin...
FOCS
2009
IEEE
14 years 3 months ago
2009
IEEE
Abstract— We consider the problem of estimating cascaded aggregates over a matrix presented as a sequence of updates in a data stream. A cascaded aggregate P ◦Q is defined by ...
ICMCS
2006
IEEE
14 years 2 months ago
2006
IEEE
This paper describes a rate control algorithm for a streaming video system that dynamically transcodes stored JPEG 2000 frames. The proposed algorithm is designed to improve overa...
GIS
2007
ACM
14 years 9 months ago
2007
ACM
Continuous spatial queries posted within an environment of moving objects produce as their results a time-varying set of objects. In the most ambitious case both queries and data ...