@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix sd: <http://darq.sf.net/dose/0.1#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix sparql: <http://kasei.us/2008/04/sparql#> .
@prefix p: <http://dbpedia.org/property/> .
# definition of an endpoint
[] a sd:Service ;
rdfs:label "DBpedia" ;
rdfs:comment "Service for DBpedia data" ;
# the endpoint url
sd:url <http://dbpedia.org/sparql> ;
# capabilities of the endpoint
sd:capability [
# the endpoint stores triples with predicate rdf:type
sd:predicate rdf:type ;
# Restriction on the subject/object
# Every legal SPARQL filter expression is allowed.
# only queries for the type http://xmlns.com/foaf/0.1/Person
# are allowed
sd:sofilter "REGEX(STR(?object),'http://xmlns.com/foaf/0.1/Person')" ;
# could also use ?subject
# statistical information
# number of triples that will be returned by
# a "?s a foaf:Person ; ?p ?o" query
sd:triples 3683409 ;
# other propeties are:
# Selectivity of a triple pattern, when object/subject is bound
# sd:objectSelectivity (default=1)
# sd:subjectSelectivity (default=1/x,
# where x is the value given by sd:triples)
];
sd:capability [
# the endpoint stores triples with predicate foaf:name
sd:predicate foaf:name ;
# no filter on subject or object
sd:sofilter "" ;
# statistical information
# there are 18000 triples with predicate foaf:name
sd:triples 18000 ;
# if the object in the triple pattern is bound
# (e.g. ?s foaf:name 'Bastian Quilitz") the result size will be
# reduced by factor 0.02. (on average)
sd:objectSelectivity "0.02"^^xsd:double ;
] ;
sd:capability [
sd:predicate foaf:mbox ;
sd:sofilter "" ;
sd:triples 18000 ;
sd:objectSelectivity 5.5E-5
] ;
sd:capability [ sd:predicate <http://purl.org/dc/terms/spatial> ] ;
sd:capability [ a sparql:any_triple ] ;
# whether the service is definitive or not
# sd:isDefinitive (default=false)
sd:isDefinitive "true"^^xsd:boolean ;
# limitations on access patterns
# the query for this service must either contain a triple pattern
# with predicate foaf:name and a bound object or
# a pattern with predicate foaf:mbox and a bound object.
# not shown here: sd:subjectBinding -> subject must be bound
sd:requiredBindings [ sd:objectBinding foaf:name ] ;
sd:requiredBindings [ sd:objectBinding foaf:mbox ] ;
# total number of triples in the store
sd:totalTriples 58787090 ;
sparql:pattern [ a foaf:Person ; p:name [] ; foaf:name [] ; p:field [] ; p:wordnet_type [] ] ;
.