SPARQL DBpedia by taxonomic term - sparql

Question

Have the following working SPARQL query that selects items from DBpedia that include the string "fish" in their name.
SELECT ?name, ?kingdom, ?phylum, ?class, ?order, ?family, ?genus, ?species, ?subspecies, ?img, ?abstract
WHERE {
?s dbpedia2:regnum ?hasValue;
rdfs:label ?name
FILTER regex( ?name, "fish", "i" )
FILTER ( langMatches( lang( ?name ), "EN" ))
?animal dbpedia2:name ?name;
foaf:depiction ?img;
dbpedia2:regnum ?kingdom
OPTIONAL { ?animal dbpedia2:ordo ?order . }
OPTIONAL { ?animal dbpedia2:phylum ?phylum . }
OPTIONAL { ?animal dbpedia2:classis ?class . }
OPTIONAL { ?animal dbpedia2:familia ?family . }
OPTIONAL { ?animal dbpedia2:genus ?genus . }
OPTIONAL { ?animal dbpedia2:species ?species . }
OPTIONAL { ?animal dbpedia2:subspecies ?subspecies . }
OPTIONAL {
FILTER ( langMatches( lang( ?abstract ), "EN" ))
}
}
GROUP BY ?name
LIMIT 500
Here is the result on SNORQL.
This approach finds animals with the word "fish" in their name (example: "starfish" which is not a fish but member of the phylum Echinoderm).
Would like a more precise query that selects DBpedia items by phylum, or by class, or by order, etc.
How to change the query to search only on dbpedia2:phylum (Chordata); on dbpedia2:classis (Actinopterygii); on dbpedia2:familia; etc. ?

Answer 1

Looking at Tuna, I see that there is a rdf:type assertion for the class
http://umbel.org/umbel/rc/Fish
that looks useful. E.g.,
select ?fish { ?fish a <http://umbel.org/umbel/rc/Fish> }
SPARQL results (10,000)
There's also the dbpedia-owl:Fish class, which gets more results:
select (count(*) as ?nFish) where {
?fish a dbpedia-owl:Fish .
}
SPARQL results (17,420)
While Wikipedia has lots of scientific classification information, I don't see much of it reflected in DBpedia. E.g,. while the Wikipedia article for Tuna has kingdom, phylum, class, order, etc., I don't see that data in the corresponding DBpedia resource.
Notes
Note that your query, as written, isn't actually legal SPARQL (even if Virtuoso, the SPARQL endpoint that DBpedia uses, accepts it). You can't have commas between the projection variables. Also, once you group by one variable, the non-group variables can't appear in the variable list. You could sample the other values though. E.g., you should end up with something like:
SELECT
?name
(sample(?kingdom) as ?kingdom_)
(sample(?phylum) as ?phylum_)
#-- ...
(sample(?img) as ?img_)
(sample(?abstract) as ?abstract_)
WHERE {
?s dbpedia2:regnum ?hasValue;
rdfs:label ?name
FILTER regex( ?name, "fish", "i" )
FILTER ( langMatches( lang( ?name ), "EN" ))
?animal dbpedia2:name ?name;
foaf:depiction ?img;
dbpedia2:regnum ?kingdom
OPTIONAL { ?animal dbpedia2:ordo ?order . }
OPTIONAL { ?animal dbpedia2:phylum ?phylum . }
OPTIONAL { ?animal dbpedia2:classis ?class . }
OPTIONAL { ?animal dbpedia2:familia ?family . }
OPTIONAL { ?animal dbpedia2:genus ?genus . }
OPTIONAL { ?animal dbpedia2:species ?species . }
OPTIONAL { ?animal dbpedia2:subspecies ?subspecies . }
OPTIONAL {
FILTER ( langMatches( lang( ?abstract ), "EN" ))
}
}
GROUP BY ?name
LIMIT 500