505 search results - page 44 / 101 » Queries with Incomplete Answers over Semistructured Data |
IEICET
2008
14 years 9 months ago
2008
We consider the polynomial time learnability of finite unions of ordered tree patterns with internal structured variables, in the query learning model of Angluin (1988). An ordered...
SEMWEB
2007
Springer
15 years 3 months ago
2007
Springer
We present the architecture of an end-to-end semantic search engine that uses a graph data model to enable interactive query answering over structured and interlinked data collecte...
PODS
2006
ACM
15 years 9 months ago
2006
ACM
Skew is prevalent in data streams, and should be taken into account by algorithms that analyze the data. The problem of finding "biased quantiles"-- that is, approximate...
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PODS
2011
ACM
14 years 16 days ago
2011
ACM
In the traditional data exchange setting, source instances are restricted to be complete in the sense that every fact is either true or false in these instances. Although natural ...
PODS
2003
ACM
15 years 9 months ago
2003
ACM
The sliding window model is useful for discounting stale data in data stream applications. In this model, data elements arrive continually and only the most recent N elements are ...