a dataflow platform for in-silico experiments based on...
TRANSCRIPT
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A Dataflow Platform for In-silico ExperimentsBased on Linked Data
Paolo Bottoni Miguel Ceriani
Computer Science Department"Sapienza", University of Rome - Italy
Databases in Networked Information SystemsDNIS 2014
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Motivation
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Motivation
Researching Online Databases
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Motivation
Data Analysis and Visualizations
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Motivation
Linked (Open) Data can help
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Motivation
How to build an Open Data application?
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Motivation
High Level, Expressive Design
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Background: Linked Data
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Background: Linked Data
Linked Open Data
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Background: Linked Data
RDF (1): the model
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Background: Linked Data
RDF (2): IRIs
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Background: Linked Data
SPARQL (1)
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?name ?mbox
WHERE
{ ?x foaf:name ?name .
?x foaf:mbox ?mbox }
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Background: Linked Data
SPARQL (2): CONSTRUCT
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX org: <http://example.com/ns#>
CONSTRUCT { ?x foaf:name ?name }
WHERE { ?x org:employeeName ?name }
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Background: Linked Data
SPARQL (3): UPDATE
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
WITH <http://example/addresses>
DELETE { ?person foaf:givenName ’Bill’ }
INSERT { ?person foaf:givenName ’William’ }
WHERE
{ ?person foaf:givenName ’Bill’
}
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Our Solution: SWOWS
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Our Solution: SWOWS Main Ideas
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 16 / 38
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Our Solution: SWOWS Main Ideas
Open Computing
Transparent Boxes vs Black Boxes
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Our Solution: SWOWS Main Ideas
Linked Programs
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Our Solution: SWOWS Main Ideas
Dataflow Paradigm
Side-Effects Free Operators
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Our Solution: SWOWS Main Ideas
Based on Established Standards
Web StandardsXML, XML DOM, XML DOM EventsScalable Vector Graphics
Semantic Web StandardsRDFSPARQL 1.1
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Our Solution: SWOWS Dataflow Language
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Our Solution: SWOWS Dataflow Language
Construct Graph Operator
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Our Solution: SWOWS Dataflow Language
Updatable Graph Operator
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 23 / 38
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Our Solution: SWOWS Semantics
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Our Solution: SWOWS Semantics
Events and (Implicit) Time
Temporal RDF Graphs (snapshots)RDF Streams (descr. of events)
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Our Solution: SWOWS Semantics
Fixpoint Operator
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Our Solution: SWOWS Semantics
Fixpoint Operator
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Our Solution: SWOWS Semantics
Update Semantics
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Our Solution: SWOWS Semantics
Update Semantics
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 27 / 38
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Our Solution: SWOWS Platform
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Our Solution: SWOWS Platform
Platform Overview
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 29 / 38
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Our Solution: SWOWS Platform
Platform Overview
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 29 / 38
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Our Solution: SWOWS Platform
Platform Overview
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 29 / 38
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Our Solution: SWOWS Platform
Platform Overview
Bottoni, Ceriani (Univ. of Rome) Dataflow Platf. for Exp.s on Linked Data DNIS 2014 29 / 38
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Our Solution: SWOWS Example Application
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Our Solution: SWOWS Example Application
An example
Data usedFAO geopolitical ontologyWorld Map with country borders from Wikipedia
OutputCountries colored on the map by derived geopolitical indexes
InteractionRadio buttons, to choose one of three different geopolitical indexes
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Our Solution: SWOWS Example Application
A screenshot
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Our Solution: SWOWS Example Application
The dataflow
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Conclusions
Outline
1 Motivation
2 Background: Linked Data
3 Our Solution: SWOWSMain IdeasDataflow LanguageSemanticsPlatformExample Application
4 Conclusions
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Conclusions
Results
Model for Linked Data Interactive Appspipeline languagehandling of eventsRDF representation of UI
Web-based Dev Platform based on this Modelvisual pipeline editorthin-client pipeline engineRDF representation of pipelines
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Conclusions
Future Work
Higher Level Development EnvironmentsUser Interface AdaptationMulti-Device InteractionParallel/Pipeline Processing
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Conclusions
Acknowledgements
Sapienza, University of RomeDipartimento di Informatica (Computer Science Department)
Regione Lazio
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Conclusions
Thank you!
swows.org
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