QUERYING HETEROGENEOUS LINKED DATA
INTERFACES THROUGH REASONING
Joachim Van Herwegen – Joachim.VanHerwegen@ugent.be
Ghent University - imec
data dump subject page Triple Pattern Fragment SPARQL query result
high client cost
high availability
high bandwidth
high server cost
low availability
low bandwidth
?name ?age
“Alice” 36
“Bob” 38
ex:Alice foaf:name “Alice”
ex:Alice foaf:age 36
ex:Alice foaf:knows ex:Bob.
ex:Bob foaf:name “Bob”
ex:Bob foaf:age 38
ex:Bob foaf:knows ex:Alice
db:IMEC foaf:member ex:Alice
db:IMinds foaf:member ex:Bob
How to combine data endpoints with
different interfaces?
db:IMEC foaf:name “imec”
db:IMinds foaf:name “iMinds”
Specify supported
SPARQL
components per
interface and how
to solve them
Endpoint metadata
Use reasoning to link
separate interfaces
to query, merge
results locally
?name ?age ?org
“Alice” 36 “imec”
“Bob” 38 “iMinds”
ex:EP1 a ex:SPARQL;
dcat:accessURL http://dbpedia.org/sparql
void:vocabulary …
ex:EP2 a ex:TPF;
dcat:accessURL http://data.ldf.org/dbpedia2014
void:vocabulary …
ex:SPARQL ex:solves ex:Project, …
ex:TPF ex:solves ex:BGP
…