A set of SPARQL examples
Chemicals with solubility, solvent, temperature and their units.
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX pqv: <http://www.wikidata.org/prop/qualifier/value/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX psv: <http://www.wikidata.org/prop/statement/value/>
PREFIX bd: <http://www.bigdata.com/rdf#>
#title: Chemicals with solubility, solvent, temperature and their units.
SELECT ?item ?inchikey ?solubility ?solvent ?solventLabel ?temperature ?unit_temperature ?unit_temperatureLabel ?unit_solubility ?unit_solubilityLabel WHERE {
?item wdt:P235 ?inchikey.
?item p:P2177 ?statement.
?statement ps:P2177 ?solubility.
?statement pq:P2178 ?solvent.
OPTIONAL {
?statement pq:P2076 ?temperature.
?statement pqv:P2076/wikibase:quantityUnit ?unit_temperature.
}
?statement psv:P2177/wikibase:quantityUnit ?unit_solubility.
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],mul,en". }
}
graph TD
classDef projected fill:lightgreen;
classDef literal fill:orange;
classDef iri fill:yellow;
v2("?inchikey"):::projected
v1("?item"):::projected
v4("?solubility"):::projected
v5("?solvent"):::projected
v3("?statement")
v6("?temperature"):::projected
v8("?unit_solubility"):::projected
v7("?unit_temperature"):::projected
a1((" "))
a2((" "))
c10([http://www.bigdata.com/rdf#serviceParam]):::iri
c12(["#91;AUTO_LANGUAGE#93;,mul,en"]):::literal
v1 --"p:direct/P235"--> v2
v1 --"p:P2177"--> v3
v3 --"p:statement/P2177"--> v4
v3 --"p:qualifier/P2178"--> v5
subgraph optional0["(optional)"]
style optional0 fill:#bbf,stroke-dasharray: 5 5;
v3 -."p:qualifier/P2076".-> v6
v3 --"p:qualifier/value/P2076"--> a1
a1 --"wikibase:quantityUnit"--> v7
end
v3 --"p:statement/value/P2177"--> a2
a2 --"wikibase:quantityUnit"--> v8
subgraph s1["http://wikiba.se/ontology#label"]
style s1 stroke-width:4px;
c10 --"wikibase:language"--> c12
end