reasoned sparql

ELIS  –  Mul*media  Lab

ReasonedSPARQL

Sam Coppens, Miel Vander Sande, Ruben Verborgh,Erik Mannens, Rik Van de Walle,

SPARQL

JACK BAUER INTERROGATION TECHNIQUEWhen asking politely just isn’t enough

Reasoning on distributed data

ReasonedSPARQL

ELIS  –  Mul*media  Lab

Goal: Reasoning as a Service

Smart SPARQL agentsoutsource reasoning to appropriate infrastructure (client-side, server-side, or third party)

ClientServer /

Data Provider

Reasoning OWL QLOWL RL / EL

ELIS  –  Mul*media  Lab

Smart SPARQL Agent

Goal: Reasoning as a Service

ClientServer /

Data Provider

Reasoning

Reasoning Grid

Goal: Reasoning as a Service

Smart SPARQL agentsoutsource reasoning to appropriate infrastructure (client-side, server-side, or third party)

ELIS  –  Mul*media  Lab

Distributed Reasoning (LarKC)

Identification Selection Transformation Reasoning Decision

REASON <http://test.com/rules.n3>OVER { ?s ?p ?o}WHERE { ?s ?p ?o}

Solution: ‘Reason’ Query Form

ELIS  –  Mul*media  Lab

SPARQL 1.1: Support for entailment regimes (RDFS, OWL) by means of BGP matching

Data provider decides inference rules support

With reasoned SPARQL, the data consumer choses the inference rules for reasoning

ELIS  –  Mul*media  Lab

Nested Queries

SELECT ?childWHERE {

:Jenna :child ?child .{

REASON {{ ?x :parent ?y } => { ?y :child ?x } .

}OVER {

?s :parent ?o .}WHERE {

?s a :Person; :parent ?o .}

}}

ELIS  –  Mul*media  Lab

•Workload Balancing

REASON {{ ?x foaf:knows ?y } => { ?y foaf:knows ?x } .

}OVER {

:Jenna foaf:knows ?person .}WHERE{

{SERVICE <http://example.org/sparql> {

:Jenna foaf:knows ?person . } } UNION {SERVICE <http://example2.org/sparql> {

:Jenna foaf:knows ?person . } }

}

ELIS  –  Mul*media  Lab

Pitfalls

Incomplete reasoning / errorslike SPARQL

Server-side vs. client-side reasoningprobably OWL QL reasoning server-side BGP matchingOWL RL and EL will happen client-side

ELIS  –  Mul*media  Lab

Distributed reasoning on top of distributed querying

Reasoning as a service

Use Cases

End userDistributed Reasoning

Framework

Endpoints

Endpoints

Endpoints

Client External Reasoner Endpoint

ELIS  –  Mul*media  Lab

Reasoning on distributed data

SPARQL

ReasonedSPARQL

ELIS  –  Mul*media  Lab

ELIS  –  Mul*media  Lab

Sam Coppens, Miel Vander Sande, Ruben Verborgh,Erik Mannens, Rik Van de Walle,

ReasonedSPARQL

Using SPARQL agents to obtain answersthrough distribution and reasoning