654 search results - page 80 / 131 » Complexity of Answering Queries Using Materialized Views |
108
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SEMWEB
2009
Springer
15 years 6 months ago
2009
Springer
Abstract. This paper presents a decidable fragment for combining ontologies and rules in order-sorted logic programming. We describe ordersorted logic programming with sort, predic...
125
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JUCS
2010
14 years 6 months ago
2010
: We develop and study the concept of dataflow process networks as used for example by Kahn to suit exact computation over data types related to real numbers, such as continuous fu...
117
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DEBU
2008
14 years 12 months ago
2008
Since the birth of XML, the processing of XML query languages like XQuery/XQueryP has been widely researched in the academic and industrial communities. Most of the approaches con...
SIGMOD
2003
ACM
15 years 12 months ago
2003
ACM
Webcams, microphones, pressure gauges and other sensors provide exciting new opportunities for querying and monitoring the physical world. In this paper we focus on querying wide ...
VLDB
2004
ACM
15 years 5 months ago
2004
ACM
The widespread adoption of XML holds out the promise that document structure can be exploited to specify precise database queries. However, the user may have only a limited knowle...