@prefix ex:<https://purl.expasy.org/sparql-examples/neXtProt/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <https://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .

ex:NXQ_00231 a sh:SPARQLExecutable,
        sh:SPARQLSelectExecutable ;
    rdfs:comment "Proteins with sequences 100% identical to other proteins"@en ;
    sh:prefixes _:sparql_examples_prefixes ;
    sh:select """PREFIX : <http://nextprot.org/rdf/>

SELECT DISTINCT ?entry WHERE {
 ?entry :isoform / :sequence / :chain ?chain1.
 ?entry2 :isoform / :sequence / :chain ?chain2.
 filter ( (?chain1 = ?chain2) && (?entry != ?entry2))
}""" ;
    schema:keywords "sequence",
        "tutorial" ;
    schema:target <https://sparql.nextprot.org/sparql> .