@prefix ex: .
@prefix rdf: .
@prefix rdfs: .
@prefix schema: .
@prefix sh: .
ex:17 a sh:SPARQLExecutable,
sh:SPARQLSelectExecutable ;
rdfs:comment "Select the average number of cross-references to the PDB database of UniProtKB entries that have at least one cross-reference to the PDB database"^^rdf:HTML ;
sh:prefixes _:sparql_examples_prefixes ;
sh:select """PREFIX rdfs:
PREFIX up:
SELECT (AVG(?linksToPdbPerEntry) AS ?avgLinksToPdbPerEntry)
WHERE
{
SELECT ?protein (COUNT(DISTINCT ?db) AS ?linksToPdbPerEntry)
WHERE
{
?protein a up:Protein .
?protein rdfs:seeAlso ?db .
?db up:database .
}
GROUP BY ?protein ORDER BY DESC(?linksToPdbPerEntry)
}""" ;
schema:keywords "cross-reference" , "count" , "PDB" ;
schema:target .