A set of SPARQL examples
Elements and their isotopes
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
#title: Elements and their isotopes.
SELECT DISTINCT ?element ?element_symbol ?isotope ?isotope_mass ?isotope_abundance WHERE {
?isotope wdt:P2374 ?isotope_abundance;
wdt:P2067 ?isotope_mass;
wdt:P279 ?element.
?element wdt:P246 ?element_symbol.
}
ORDER BY (?isotope_mass)
graph TD
classDef projected fill:lightgreen;
classDef literal fill:orange;
classDef iri fill:yellow;
v4("?element"):::projected
v5("?element_symbol"):::projected
v2("?isotope"):::projected
v3("?isotope_abundance"):::projected
v1("?isotope_mass"):::projected
v2 --"wdt:P2374"--> v3
v2 --"wdt:P2067"--> v1
v2 --"wdt:P279"--> v4
v4 --"wdt:P246"--> v5