1832 search results - page 54 / 367 » Querying RDF Data Using A Multigraph-based Approach |
131
Voted
DATESO
2007
15 years 4 months ago
2007
We address a problem of updating XML documents having their XML schema described by a Document Type Definition (DTD) without breaking their validity. We present a way how to expre...
129
Voted
ADBIS
2004
Springer
15 years 8 months ago
2004
Springer
Abstract. Query reformulation techniques based on semantic knowledge have been used in two ways in database management systems, namely for query optimization and for data integrati...
124
Voted
WWW
2010
ACM
15 years 8 months ago
2010
ACM
Typical approaches for querying structured Web Data collect (crawl) and pre-process (index) large amounts of data in a central data repository before allowing for query answering....
116
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AMAI
2005
Springer
15 years 2 months ago
2005
Springer
Mediator systems integrate distributed, heterogeneous and autonomous data sources, but their e ective use requires the solution of hard query optimization problems. This is usuall...
201
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ICDE
2001
IEEE
16 years 4 months ago
2001
IEEE
We describe efficient algorithms for accurately estimating the number of matches of a small node-labeled tree, i.e., a twig, in a large node-labeled tree, using a summary data str...