427 search results - page 65 / 86 » Conjunctive Query Answering in EL using a Database System |
PODS
2009
ACM
14 years 9 months ago
2009
ACM
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
AMW
2009
13 years 9 months ago
2009
Conventional operators for data retrieval are either based on exact matching or on total order relationship among elements. Neither of them is appropriate to manage complex data, s...
SIGMOD
1998
ACM
14 years 25 days ago
1998
ACM
Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query P, we ...
SEMCO
2008
IEEE
14 years 3 months ago
2008
IEEE
We developed a novel analytical environment to aid in the examination of the extensive amount of interconnected data available for genome projects. Our focus is to enable ity and ...
WIDM
2003
ACM
14 years 1 months ago
2003
ACM
Whenever XML data must be shared by heterogeneous applications, transformations between different applicationspecific XML formats are necessary. The state-of-the-art method transf...