5221 search results - page 304 / 1045 » An On-line Problem Database |
166
click to vote
WWW
2005
ACM
16 years 7 months ago
2005
ACM
Constructing and maintaining semantic mappings are necessary but troublesome in data sharing systems. While most current work focuses on seeking automated techniques to solve this...
263
click to vote
VLDB
2007
ACM
16 years 6 months ago
2007
ACM
The performance of XML database queries can be greatly enhanced by rewriting them using materialized views. We study the problem of rewriting a query using materialized views, whe...
237
click to vote
SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
We demonstrate a novel query interface that enables users to construct a rich search query without any prior knowledge of the underlying schema or data. The interface, which is in...
172
click to vote
SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
As databases become more pervasive through the biological sciences, various data quality issues regarding data legacy, data uniformity and data duplication arise. Due to the natur...
175
click to vote
SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
Trees and graphs are widely used to model biological databases. Providing efficient algorithms to support tree-based or graph-based querying is therefore an important issue. In th...