PREFIX : <http://purl.bdrc.io/ontology/core/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX bdr: <http://purl.bdrc.io/resource/>
PREFIX apf: <http://jena.apache.org/ARQ/property#>
# find all resources with duplicate blank nodes
SELECT ?r ?diff
WHERE {
{
?r a :Person .
GRAPH ?r {
SELECT (COUNT(?id) AS ?c) (COUNT(DISTINCT ?id) AS ?cd)
WHERE {
?r :personName ?b .
?b rdfs:label ?nm .
?b a ?type .
BIND (LANG(?nm) AS ?LANG)
?id apf:CONCAT (?type "+" ?nm "@" ?LANG) .
}
}
} .
BIND (?c - ?cd AS ?diff)
FILTER (?diff != 0)
} LIMIT 10
# given a resource, ?R, report the difference of blank nodes and distinct blank nodes
SELECT ?diff
WHERE {
{ SELECT (COUNT(?id) AS ?c) (COUNT(DISTINCT ?id) AS ?cd)
WHERE {
?R :personName ?b .
?b rdfs:label ?nm .
?b a ?type .
BIND (LANG(?nm) AS ?LANG)
?id apf:CONCAT(?type "+" ?nm "@" ?LANG)
}
} .
BIND (?c - ?cd AS ?diff)
}
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