1Ghent University – imec – IDLab, Belgium
2National Institute of Informatics, Sokendai University, Japan
Version A: ex:Bob a ex:Animal. ex:Bob foaf:name "Bob". Version B: ex:Bob a ex:Cat. ex:Bob foaf:name "Bob".
Language: ex:Cat rdf:subClassOf ex:Animal.
- ex:Bob a ex:Animal. + ex:Bob a ex:Cat.
+ ex:Bob a ex:Cat.
DBpedia 2015, DBpedia 2016, ...
Set of triples annotated with version label i
Which cities existed in (DBpedia) 2016?
Which cities were created or
removed between 2015 and 2016?
In which years has Brussels existed?
Semantic extension of the regular query atoms by adding a versioned language
rdf:type
relations inferrable through rdfs:subClassOf
.Structural queries | Semantic queries | # | |
---|---|---|---|
Q1 | 0.56 ms | 2.51 ms | 10 |
Q2 | 0.47 ms | 2.26 ms | 10 |
Q3 | 0.63 ms | 1.76 ms | 9 |
Q4 | 0.58 ms | 1.55 ms | 6 |
Q5 | 0.33 ms | 0.97 ms | 6 |
Q6 | 0.15 ms | 0.94 ms | 7 |
Q7 | 0.26 ms | 0.89 ms | 6 |