191 search results - page 27 / 39 » XPath Query Evaluation: Improving Time and Space Efficiency |
CIKM
2009
Springer
14 years 3 months ago
2009
Springer
In order to enable scalable querying of graph databases, intelligent selection of subgraphs to index is essential. An improved index can reduce response times for graph queries si...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
Linear optimization queries retrieve the top-K tuples in a sliding window of a data stream that maximize/minimize the linearly weighted sums of certain attribute values. To effici...
VLDB
1998
ACM
14 years 19 days ago
1998
ACM
We propose and evaluate two indexing schemes for improving the efficiency of data retrieval in high-dimensional databases that are incomplete. These schemes are novel in that the ...
SIGMOD
2010
ACM
13 years 3 months ago
2010
ACM
We propose and study a new ranking problem in versioned databases. Consider a database of versioned objects which have different valid instances along a history (e.g., documents i...
TIME
1997
IEEE
14 years 19 days ago
1997
IEEE
Temporal databases provide built-in supports for efficient recording and querying of time-evolving data. In this paper, data clustering issues in temporal database environment are...