Count Aggregation in Semantic Queries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F13%3A00208081" target="_blank" >RIV/68407700:21230/13:00208081 - isvavai.cz</a>
Result on the web
<a href="http://ceur-ws.org/Vol-1046/SSWS2013_paper1.pdf" target="_blank" >http://ceur-ws.org/Vol-1046/SSWS2013_paper1.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Count Aggregation in Semantic Queries
Original language description
In this paper we study the distinct count aggregation function used in queries into expressive ontologies. The main differences in this settings opposed to aggregation in relational database systems are the Open World Assumption and incomplete knowledge.We propose different interpretations useful in different practical use-cases of the distinct count function, i.e. basic count, semantic count, epistemic count and semantic tuple count some of which use knowledge derived from the ontology in order to obtain results in accordance with the Open World Assumption. We use interval semantics to model the uncertainty of the distinct count function's result induced by incomplete knowledge in the ontology. We show that interval semantics are particularly usefulin aggregate queries with filtering clause and when we need the retrieval of the boundaries of the uncertainty of the distinct count function's result. We study and present relationships among the different interpretations and decidabilit
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
JC - Computer hardware and software
OECD FORD branch
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Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 9th International Workshop on Scalable Semantic Web Knowledge Base Systems
ISBN
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ISSN
1613-0073
e-ISSN
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Number of pages
16
Pages from-to
1-16
Publisher name
CEUR Workshop Proceedings
Place of publication
Tilburg
Event location
Sydney
Event date
Oct 21, 2013
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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