is there a way to query dbpedia's other language version? I would like to use data that is often non-existent in English version of dbpedia. For example, en and de, the second one has georss property and first one does not.
My problem is, query below won't fetch Aachen's Cathedral as in English version in does not have any georss data. How can I ask de.dbpedia.org for data?
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
SELECT ?name ?abstract ?ns ?ew
WHERE{
?m <http://dbpedia.org/ontology/abstract> ?abstract.
?m foaf:name ?name.
?m georss:point ?coord.
bind( xsd:double(strbefore( ?coord, " " )) as ?ns )
bind( xsd:double(strafter( ?coord, " " )) as ?ew )
FILTER ( ?ns > 50.5 && ?ns < 50.9 && ?ew > 6.02 && ?ew < 6.14 )
FILTER (LANG(?abstract) = "de")
}
You can run your query against the localized SPARQL endpoint. In this case, try running your query against http://de.dbpedia.org/sparql. When I do that, I get results that include Aachen (though I'm not a German speaker, so I don't know whether the description is what you're looking for).
Related
I need to find the names of similar types from DBpedia so I'm trying to figure out a query which can return me the names of entities which have same subject type in its dct:subject (example I want to find similar types of white house so i want to write a query for same . I'm considering the dct:subject to find them ). If there is any other approach please mention it
Previously I tried it for rdf:type but the result are not so good and some time it shows time out
I have done my problem by the query mentioned below and now i want to consider dct:subject instead of rdf:type
select distinct ?label ?resource count(distinct ?type) as ?score where {
values ?type { dbo:Thing dbo:Organization yago:WikicatIslam-relatedControversies yago:WikicatIslamistGroups yago:WikicatRussianFederalSecurityServiceDesignatedTerroristOrganizations yago:Abstraction100002137 yago:Act100030358 yago:Cabal108241798 yago:Group100031264 yago:Movement108464601 yago:PoliticalMovement108472335
}
?resource rdfs:label ?label ;
foaf:name ?name ;
a ?type .
FILTER (lang(?label) = 'en').
}
ORDER BY DESC(?score)
I’m new to query languages and linked data so thanks a lot for the help. I also have a similar question about sparql on wikidata
Wikidata sparql query returns 0 result
I would like to look up all the art movements in dbpedia with the associated artists (associated with the movement -peopleNam, famous for the movement-famousName, influence the movement-influenceName) here is my query with lots of redundant prefix (that I could not enter because of the amount of links)
SELECT ?movementName ?famousName ?peopleName ?influenceName
WHERE {
?m dc:subject <http://dbpedia.org/resource/Category:Art_movements> .
?m rdfs:label ?movementName .
FILTER(LANG(?movementName) = "en")
?m dbp:knownFor ?a .
?a rdfs:label ?famousName .
FILTER(LANG(?famousName) = "en")
?m dbp:movement ?b .
?b rdfs:label ?peopleName .
FILTER(LANG(?peopleName) = "en")
?m dbp:influencedBy ?d .
?d rdfs:label ?influenceName .
FILTER(LANG(?influenceName) = "en")
}'
When I run the query with only the movement name I get 235 results but whenever I add any other artist name, I get 0 result. Could you show me what went wrong?
A similar query is done in wikidata with some encouraging results but I haven’t tried to match the two sources yet.
Thanks
I am trying to get abstract using Sqarql with dbpedia datasets.
When I am running the following query on Virtuoso,
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?abstract WHERE {
[ rdfs:label ?name
; dbpedia-owl:abstract ?abstract
] .
FILTER langMatches(lang(?abstract),"en")
VALUES ?name { "London"#en }
}
LIMIT 10
I am getting the result, however if I modify the name to say 'Gokarna' which is a south indian tourist spot, I am not getting any data. However I do see the resource page online on dbpedia for Gokarna(http://dbpedia.org/page/Gokarna,_India). What am I doing wrong? I need to get similar data for close to 800 indian places.
When you use values, you'd get only those that exactly match your string. For Gokarna, that would work for #de, #it, #fr, but not for #en, as there the label is different, as you can see also from the previous answer.
I would suggest to use contains, instead of values:
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?abstract WHERE {
[ rdfs:label ?name
; dbpedia-owl:abstract ?abstract
] .
FILTER langMatches(lang(?abstract),"en")
FILTER langMatches(lang(?name),"en")
FILTER CONTAINS (?name, "Gokarna" )
}
LIMIT 10
I am not that experience with Sqarql but as much i can see in your code and checked with dbpedia library...
it is not just Gokarna. it is "Gokarna,_India".
This should work..
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?abstract WHERE {
[ rdfs:label ?name
; dbpedia-owl:abstract ?abstract
] .
FILTER langMatches(lang(?abstract),"en")
VALUES ?name { "Gokarna,_India"#en }
}
LIMIT 10
If you look through the DBpedia page for Gokarna, India that you linked to, you'll notice that its rdfs:label is "Gokarna, India". But its foaf:name is just "Gokarna". This would mean you should modify your query to:
PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?abstract WHERE {
[ foaf:name ?name
; dbpedia-owl:abstract ?abstract
] .
FILTER langMatches(lang(?abstract),"en")
VALUES ?name { "Gokarna"#en }
}
LIMIT 10
Though this will return other Gokarnas too: Gokarna, Nepal, Gokarna, Bangladesh and Gokarna (film). If you want to remove these, you will have to figure out another filter (possibly dbo:country dbr:India).
I'm entering the following query at http://dbpedia.org/sparql:
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
SELECT ?s ?name ?value ?lat ?lng
WHERE {
?s a <http://dbpedia.org/ontology/PopulatedPlace> .
?s <http://dbpedia.org/property/name> ?name .
?s <http://dbpedia.org/property/populationTotal> ?value .
FILTER (?lng > -8.64 AND ?lng < 2.1 AND ?lat < 61.1 AND ?lat > 49.35 )
?s geo:lat ?lat .
?s geo:long ?lng .
}
(The bounding box is intended to be for the UK, the other option is to add <http://dbpedia.org/ontology/country> <http://dbpedia.org/resource/United_Kingdom> ., but there's a possibility that some places might not have been tagged with UK as the country).
The problem is that it doesn't seem to be pulling back many places (around 290).
Swapping population for populationTotal gives 1588 places, and I can't figure out (semantically) which one should be used.
Is this a limitation with the underlying data, or is there something that could be improved in the way I'm formulating the query?
Note: this question is mainly academic now as I got the info from http://download.geonames.org/export/dump/GB.zip, but I'd much prefer to use open data and the semantic web, so posting up this question to see if there was something I was missing, or to find out if there is a shortcoming in how the data is being scraped from Wikipedia and whether I can muck in.
Your query is only returning locations that have a value for populationTotal. For example, if Town A has "10,000" for populationTotal in the database, and Town B has NULL, only Town A will be returned.
If you want to return all locations in the UK, then you need to specify population as an optional parameter. This query will show you all the locations, as well as the populations for the ones that have that data.
PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#>
SELECT ?s ?name ?value ?lat ?lng
WHERE {
?s a <http://dbpedia.org/ontology/PopulatedPlace> .
?s <http://dbpedia.org/property/name> ?name .
OPTIONAL { ?s <http://dbpedia.org/property/populationTotal> ?value . }
FILTER (?lng > -8.64 AND ?lng < 2.1 AND ?lat < 61.1 AND ?lat > 49.35 )
?s geo:lat ?lat .
?s geo:long ?lng .
}
I would like to get some places from DBPedia in certain area, and that would be easy if those points would had geometry property. However, all they have is georss:point. I have converted this to two doubles, but I cannot convert them to geo:geometry object that can be supplied to location filter.
The code I have thus far:
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
SELECT ?name
?abstract
?ns
?ew
WHERE
{ ?m foaf:name ?name
. ?m georss:point ?coord
. ?m <http://dbpedia.org/ontology/abstract> ?abstract
. BIND( xsd:double(strbefore( ?coord, " " )) AS ?ns )
BIND( xsd:double(strafter( ?coord, " " )) AS ?ew )
BIND( geo:Point(?ew, ?ns) AS ?geo ) # <-- I have problem with this
FILTER (bif:st_intersects (?geo, bif:st_point(?geo), 10))
FILTER (LANG(?abstract) = "en")
}
If you know any way to convert those or other filtering method, please enlighten me. :)
There is not enough information here to give you a simple and clear answer.
However, I think you may be able to figure it out from the examples in the GEOSPARQL documentation for Virtuoso, the DBMS engine which hosts DBpedia. There's more here.