96 search results - page 10 / 20 » PTIME Queries Revisited |
IS
2012
12 years 3 months ago
2012
When transforming data one often wants certain information in the data source to be preserved, i.e., we identify parts of the source data and require these parts to be transformed...
WISE
2007
Springer
14 years 1 months ago
2007
Springer
We study and present our findings on two closely related problems on xpath rewriting using views when both the view and the query are tree patterns involving /,// and []. First, g...
ICDT
1997
ACM
13 years 11 months ago
1997
ACM
Abstract. The goal of this paper is to study tractable iteration mechanisms for bags. The presence of duplicates in bags prevents iteration mechanisms developed in the context of s...
AIMSA
2008
Springer
14 years 2 months ago
2008
Springer
Documents, especially long ones, may contain very diverse passages related to different topics. Passages Retrieval approaches have shown that, in most cases, there is a great pote...
PODS
2005
ACM
14 years 7 months ago
2005
ACM
The traditional statistical assumption for interpreting histograms and justifying approximate query processing methods based on them is that all elements in a bucket have the same...