1. Sparql Examples

2. Q1: Querying Berners-Lee’s FOAF data
Redland Rasqal RDF Query Demonstration
Data:
Query:
PREFIX foaf: <
SELECT ?name
WHERE {
?person foaf:name ?name . }

3. Q2: Querying Berners-Lee’s FOAF data
Redland Rasqal RDF Query Demonstration
Data:
Query:
PREFIX foaf: <
SELECT *
WHERE {
?person foaf:name ?name .
?person foaf:mbox ? . }

4. Q3: Querying Berners-Lee’s FOAF data
Redland Rasqal RDF Query Demonstration
Data:
Query:
PREFIX foaf: <
PREFIX card: <
SELECT ?homepage
WHERE {
card:i foaf:knows ?known .
?known foaf:homepage ?homepage . }

5. Q4: DBPedia http://dbpedia.org/snorql/ Prefix:
PREFIX owl: <
PREFIX xsd: <
PREFIX rdfs: <
PREFIX rdf: <
PREFIX foaf: <
PREFIX dc: <
PREFIX : <
PREFIX dbpedia2: <
PREFIX dbpedia: <
PREFIX skos: <

6. Q4: People who were born in Berlin before 1900
Query:
SELECT ?name ?birth ?death ?person
WHERE { ?person dbo:birthPlace :Berlin .
?person dbo:birthDate ?birth .
?person foaf:name ?name .
?person dbo:deathDate ?death .
FILTER (?birth < " "^^xsd:date) . }
ORDER BY ?name

7. Q5: German musicians with German and English descriptions
Query:
SELECT ?name ?description_en ?description_de ?musician
WHERE {?musician foaf:name ?name .
OPTIONAL { ?musician rdfs:comment ?description_en .
FILTER (LANG(?description_en) = 'en') }
OPTIONAL { ?musician rdfs:comment ?description_de .
FILTER (LANG(?description_de) = 'de') } }

8. Q6: German musicians who were born in Berlin
Query:
SELECT ?name ?birth ?description ?person WHERE {
?person a dbo:MusicalArtist .
?person dbo:birthPlace :Berlin .
?person dbo:birthDate ?birth .
?person foaf:name ?name .
?person rdfs:comment ?description .
FILTER (LANG(?description) = 'en') .
} ORDER BY ?name

9. Q7: Soccer players who are born in a country with more than 10 million inhabitants, who played as goalkeeper for a club that has a stadium with more than 30,000 seats and the club country is different from the birth country
Query:
SELECT distinct ?soccerplayer ?countryOfBirth ?team ?countryOfTeam ?stadiumcapacity {
?soccerplayer a dbo:SoccerPlayer ;
dbo:position|dbp:position < ;
dbo:birthPlace/dbo:country* ?countryOfBirth ;
#dbo:number 13 ;
dbo:team ?team .
?team dbo:capacity ?stadiumcapacity ; dbo:ground ?countryOfTeam .
?countryOfBirth a dbo:Country ; dbo:populationTotal ?population .
?countryOfTeam a dbo:Country .
FILTER (?countryOfTeam != ?countryOfBirth)
FILTER (?stadiumcapacity > 30000)
FILTER (?population > )
} order by ?soccerplayer

10. Q8: Is Amazon river longer than Nile
Sparql Endpoint:
Data:
Query:
PREFIX prop: <
ASK {
< prop:length ?amazon .
< prop:length ?nile .
FILTER(?amazon > ?nile) . }