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dbpedia-ontology-class-cleansing.sql
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-- Problem incorrect class assignments e.g., People as Company, Films etc instances
SPARQL
SELECT SAMPLE (?x) AS ?sample ?typeX (count(*) as ?c) {
?x dbo:parent ?y.
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
# FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER(strstarts(str(?typeX),str(dbo:)))
FILTER NOT EXISTS {?y a ?subtype. ?subtype rdfs:subClassOf ?typeY}
}
GROUP BY ?typeX ORDER BY DESC(?c) ;
-- Fix
-- Levraging rdfs:domain and rdfs:range semantics
SPARQL
SELECT SAMPLE (?x) AS ?sample ?typeX (count(*) as ?c) {
?x dbo:parent ?y.
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER(strstarts(str(?typeX),str(dbo:)))
FILTER NOT EXISTS {?y a ?subtype. ?subtype rdfs:subClassOf ?typeY}
}
GROUP BY ?typeX ORDER BY DESC(?c) ;
-- Fix
-- Levraging rdfs:domain and rdfs:range semantics
SPARQL
SELECT ?x as ?child ?typeX as ?childType dbo:parent as ?relation ?y as ?parent ?typeY as ?parentType
WHERE {
?x dbo:parent ?y .
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER NOT EXISTS {?y rdf:type dbo:Person}
}
LIMIT 10 ;
SPARQL
SELECT ?x ?y
WHERE {
?x dbo:parent ?y .
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER NOT EXISTS {?y rdf:type dbo:Person}
}
LIMIT 10 ;
SPARQL
CONSTRUCT {?x dbo:parent ?y}
WHERE
{
{
SELECT ?x ?typeX ?y ?typeY
WHERE
{
?x dbo:parent ?y .
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER NOT EXISTS {?y rdf:type dbo:Person}
}
LIMIT 10
}
} ;
SPARQL
ASK {?x dbo:parent ?y}
WHERE
{
{
SELECT ?x ?typeX ?y ?typeY
WHERE
{
?x dbo:parent ?y .
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER NOT EXISTS {?y rdf:type dbo:Person}
}
LIMIT 10
}
} ;
SPARQL
SELECT ?x as ?child ?typeX as ?childType dbo:parent as ?relation ?y as ?parent ?typeY as ?parentType
WHERE
{
{
SELECT ?x ?typeX ?y ?typeY
WHERE
{
?x dbo:parent ?y.
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER(strstarts(str(?typeX),str(dbo:)))
FILTER NOT EXISTS {?y a ?subtype. ?subtype rdfs:subClassOf ?typeY}
}
LIMIT 100
}
} ;
SPARQL
CONSTRUCT {?x dbo:parent ?y}
WHERE
{
{
SELECT ?x ?typeX ?y ?typeY
WHERE
{
?x dbo:parent ?y.
?y a ?typeY .
?x a ?typeX .
dbo:parent rdfs:domain ?domain;
rdfs:range ?range .
FILTER (?typeX = ?domain and ?typeY = ?range)
FILTER(strstarts(str(?typeX),str(dbo:)))
FILTER NOT EXISTS {?y a ?subtype. ?subtype rdfs:subClassOf ?typeY}
}
LIMIT 100
}
}