I want to query the American Physicsts and get the list of physicists. How can I do this?
The SPARQL you need would look like this ....
PREFIX category: <http://dbpedia.org/resource/Category:>
PREFIX dcterms: <http://purl.org/dc/terms/>
SELECT *
WHERE {
?s dcterms:subject category:American_physicists .
}
see results here
If you want the list with some extra predicates you need to join more triple patterns using the variable ?s. For instance, to retrieve the birthdate for each physicist ...
PREFIX category: <http://dbpedia.org/resource/Category:>
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dbpedia: <http://dbpedia.org/ontology/>
SELECT *
WHERE {
?s dcterms:subject category:American_physicists .
?s dbpedia:birthDate ?bithdate .
}
results here
Related
I would like to get all Cities of India from DBpedia database.
I tried many stackoverflow solutions but till now i have not got my required output.
How to fetch all Cities of Country using SPARQL.
Might be (for sure) incomplete since data in DBpedia is based on mappings from Wikipedia (here only the infoboxes):
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbr: <http://dbpedia.org/resource/>
SELECT ?s WHERE {
?s a dbo:City ;
dbo:country dbr:India
}
Or you can try to use the Wikipedia categories:
PREFIX dbc: <http://dbpedia.org/resource/Category:>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX dct: <http://purl.org/dc/terms/>
SELECT DISTINCT ?s WHERE {
?s dct:subject/skos:broader* dbc:Cities_and_towns_in_India
}
I got solution to get Cities of Country. For Example if we want to fetch cities of India then use dbr:India in your Query
SELECT DISTINCT ?placeName WHERE {
?placeName a yago:City108524735 ; dbo:country dbr:India
}
Thanks #AKSW for your help.
I'm very new in OpenData and try to write a query in SPARQL.
My goal is to get data for following set of criteria:
- Category: Home_automation
- select all items from type "Thing"
- with at least one entry in "is Product of"
- that have a picture-url with a German description
I tried the following:
PREFIX cat: <http://dbpedia.org/resource/Category:>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
SELECT *
WHERE {
cat:Home_automation skos:broader ?x
}
But now I don't know how to add the other filters to the where clause.
I tried to user broader:... to get the items, but I think that was the wrong direction.
I tested the queries with: https://dbpedia.org/sparql
The result should be:
| (label) | (url)
|--------------------------|-----------------------------------
|"Kurzzeitwecker"#de | urls to the picture of the device
|"Staubsauger"#de | -||-
|"Waschmaschine"#de | -||-
|"Geschirrspülmaschine"#de | -||-
Does anyone have some tips please?
UPDATE: new query:
PREFIX cat: <http://dbpedia.org/resource/Category:>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?s ?label WHERE {
?s ?p cat:Home_automation .
?s rdf:type owl:Thing .
?s rdfs:label ?label
FILTER (LANG(?label)='de')
}
order by ?p
It is not clear what you want. You must first know what exact related information dbpedia contains and how they are structured.
However, you can try discovering what types of relationships cat:Home_automation is involved in, thus, you may know better what you want.
I suggest starting by generic queries, to specify how cat:Home_automation occurs in dbpedia, then, you might be able to go more specific, and pose further queries.
A query to list triples where cat:Home_automation is an subject:
PREFIX cat: <http://dbpedia.org/resource/Category:>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
SELECT ?p ?o WHERE {
cat:Home_automation ?p ?o
}
order by ?p
A query to list triples where cat:Home_automation is an object:
PREFIX cat: <http://dbpedia.org/resource/Category:>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
SELECT ?s ?p WHERE {
?s ?p cat:Home_automation
}
order by ?p
check the results, see what is interesting for you, and then continue with further queries.
What I want from my sparql query is to not only get a list of all the European countries, but I want all the info they have. For instance, their capital, currency, areaKM and so on. The end goal is to use the datasets I aquired in protege. The query I have tried looked like this:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX db: <http://dbpedia.org/>
PREFIX dbp: <http://dbpedia.org/property/>
SELECT DISTINCT ?country ?capital ?area ?currency ?wealth
WHERE {
?country rdf:type yago:EuropeanCountries;
dbo:capital ?capital;
dbp:areaKm ?area;
dbp:currencyCode ?currency;
dbp:gdpPppPerCapita ?wealth .
}
This seemed to work at first, but as of yesterday it won't anymore. So my question is, how do i get all european countries and their properties given by dbpedia using sparql.
Thanks in advance!
Since yesterday, DBpedia 2016-04 is loaded into http://dbpedia.org/sparql and as far as I can see, the YAGO data isn't loaded (yet?)
At least, this simplified query already doesn't return any result:
PREFIX yago: <http://dbpedia.org/class/yago/>
SELECT DISTINCT * WHERE {
?country a yago:EuropeanCountries
}
Alternative query using the DBpedia categories (and your YAGO type is more or less the same):
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX dct: <http://purl.org/dc/terms/>
SELECT DISTINCT *
WHERE
{ ?country dct:subject <http://dbpedia.org/resource/Category:Countries_in_Europe> ;
dbo:capital ?capital
OPTIONAL
{ ?country dbp:areaKm ?area }
OPTIONAL
{ ?country dbp:currencyCode ?currency }
OPTIONAL
{ ?country dbp:gdpPppPerCapita ?wealth }
}
Note, that I put some properties into an OPTIONAL as at least for dbp:currencyCode and dbp:gdpPppPerCapita there is no data (anymore?).
I need to get all awarded movies on 80th Award Ceremony
I tried to write SPARQL query:
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix dbpedia-owl: <http://dbpedia.org/ontology/>
prefix movie: <http://data.linkedmdb.org/resource/movie/>
prefix award: <http://data.linkedmdb.org/page/film_awards_ceremony/180/>
select distinct ?film ?award where {
{ ?film a movie:film.
?award a movie:film_awards_ceremony.
} union
{ ?film a dbpedia-owl:Film }
?film rdfs:label ?label .
}
But the result is full movies list.
I found the data I need also here: https://www.freebase.com/m/02pgky2
How to combine (union) these entities in a right way ?
If is not possible - How to get the result from freebase using SPARQL and dbpedia.org?
I want to get all pages which have a specified category and a specified key. My query:
PREFIX dbpedia: <http://dbpedia.org/>
PREFIX dbpedia2: <http://dbpedia.org/property/>
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX dcterms: <http://dublincore.org/2010/10/11/dcterms.rdf#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
PREFIX grs: <http://www.georss.org/georss/point>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?page ?cat ?key ?value (lang(?value) as ?language) WHERE {
?page dcterms:subject ?cat .
?page ?key ?value .
FILTER(
regex(?cat, "category:Amusement_parks_in_the_Netherlands") &&
?key = foaf:depiction
)
}
But it return zero results. See here: SNORQL query
It should at least return this page: http://dbpedia.org/page/Duinrell (because it matches the criteria).
Any ideas?
There's a couple of things wrong with your query. First of all, don't use a regex when comparing URIs. Instead of:
regex(?cat, "category:Amusement_parks_in_the_Netherlands")
use:
?cat = <http://dbpedia.org/resource/category:Amusement_parks_in_the_Netherlands>
Second: your namespace prefix for dublin core seems wrong. You are querying the property dcterms:subject, and in your query, the prefix dcterms is mapped to the namespace http://dublincore.org/2010/10/11/dcterms.rdf#. However, the actual property in DBPedia is http://purl.org/dc/terms/subject, so your namespace prefix should map to http://purl.org/dc/terms/ instead.