2340 search results - page 307 / 468 » Data abstraction and information hiding |
199
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AICOM
2004
15 years 6 months ago
2004
Abstract. We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous informatio...
205
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PVLDB
2010
15 years 5 months ago
2010
Database systems often use XML schema to describe the format of valid XML documents. Usually, this format is determined when the system is designed. Sometimes, in an already funct...
191
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ICDM
2010
IEEE
15 years 4 months ago
2010
IEEE
Abstract--The increasing popularity of social media is shortening the distance between people. Social activities, e.g., tagging in Flickr, bookmarking in Delicious, twittering in T...
192
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IDEAS
2010
IEEE
15 years 4 months ago
2010
IEEE
Abstract. We consider the class of applications that manage time series (TS) and propose a data model and a query language that let these applications manipulate TS data sets at a ...
186
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SEMWEB
2010
Springer
15 years 4 months ago
2010
Springer
Abstract. In order to effectively and quickly answer queries in environments with distributed RDF/OWL, we present a query optimization algorithm to identify the potentially relevan...