448 search results - page 20 / 90 » Queries and Constraints on Semi-structured Data |
95
Voted
EDBT
2008
ACM
14 years 11 months ago
2008
ACM
The goal of the Semantic Web is to support semantic interoperability between applications exchanging data on the web. The idea heavily relies on data being made available in machi...
KDD
2004
ACM
15 years 10 months ago
2004
ACM
In this paper we provide a fast, data-driven solution to the failing query problem: given a query that returns an empty answer, how can one relax the query's constraints so t...
DAWAK
2001
Springer
15 years 2 months ago
2001
Springer
Tree based indexing structures like -trees, ·-trees, Bitmap indexes and Ê-trees have become essential for getting good performance when accessing vast datasets. However, most dat...
60
Voted
WWW
2004
ACM
15 years 10 months ago
2004
ACM
This paper describes a query algebra for queries over XML p2p databases that provides explicit mechanisms for modeling data dissemination, replication constraints, and for capturi...
DAISD
1994
14 years 11 months ago
1994
We are interested in the problem of validating the consistency of integrity constraints when data is modi ed. In particular, we consider how constraints can be checked with only p...