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RDFS with Attribute Equations via SPARQL Rewriting
Published on Jul 08, 20133220 Views
In addition to taxonomic knowledge about concepts and properties typically expressible in languages such as RDFS and OWL, implicit information in an RDF graph may be likewise determined by arithmetic
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RDFS with Attribute Equations via SPARQL Rewriting00:00
Place de la Comédie, Montpellier - 100:11
Place de la Comédie, Montpellier - 200:46
Use equations to infer missing numbers01:01
RDFS with Attribute Equations via SPARQL Rewriting - 102:02
What is the population density of Montpellier?02:30
RDFS with Attribute Equations via SPARQL Rewriting - 202:44
We need RDFS for integrating different sources02:57
RDFS with Attribute Equations via SPARQL Rewriting - 303:37
Syntax RDFS and equations - 103:50
Syntax RDFS and equations - 204:24
Syntax RDFS and equations - 304:36
Syntax RDFS and equations - 404:46
Syntax RDFS and equations - 504:57
Extend the DLrdfs Semantics by equations - 105:31
Extend the DLrdfs Semantics by equations - 205:57
Extend the DLrdfs Semantics by equations - 306:05
Extend the DLrdfs Semantics by equations - 406:11
Formulate equations as rules06:29
Forward chaining often does not terminate07:18
Naive backward chaining does not terminate08:41
Rules are problematic for applying equations09:55
RDFS with Attribute Equations via SPARQL Rewriting - 410:39
Query answering in DL-Lite: PerfectRef10:47
RDFS with Attribute Equations via SPARQL Rewriting - 511:40
Break the infnite series of equation applications12:07
Extend the DL-Lite PerfectRef algorithm14:29
PerfectRef with adorned attributes15:31
Rewrite SPARQL queries by PerfectRef - 117:36
RDFS with Attribute Equations via SPARQL Rewriting - 617:46
Rewrite SPARQL queries by PerfectRef - 218:13
RDFS with Attribute Equations via SPARQL Rewriting - 719:07
How does the rewriting algorithm perform on real world data? - 119:22
How does the rewriting algorithm perform on real world data? - 219:34
Jena rules with ARQ gives no results19:36
Rewriting is signifcantly faster than Jena rules with noValue19:46
Conclusions20:09