query-17c9f4d40f5d906864246a7e5ac4434e
General looping instance/subclass combinationThis sparql query could in principle catch all the general loop cases - except it times out on the current WDQS...
Use at
- https://query.wikidata.org/sparql
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?item WHERE {
?item (wdt:P31|wdt:P279)+ ?item .
}
Query found at
- https://www.wikidata.org/wiki/Wikidata:WikiProject_Ontology/Problems
- https://www.wikidata.org/wiki/Wikidata:WikiProject_Ontology/Problems/Loops
graph TD
classDef projected fill:lightgreen;
classDef literal fill:orange;
classDef iri fill:yellow;
v1("?item"):::projected
a1((" "))
f0[["sameterm(?item,)"]]
f0 --> v1
f0 --> a1
subgraph union0[" Union "]
subgraph union0l[" "]
style union0l fill:#abf,stroke-dasharray: 3 3;
v1 --"wdt:P279"--> a1
end
subgraph union0r[" "]
style union0r fill:#abf,stroke-dasharray: 3 3;
v1 --"wdt:P31"--> a1
end
union0r <== or ==> union0l
end