sparql mimicking shacl

sparql-shacl.sql

PREFIX pav: <http://purl.org/pav/>
PREFIX : <http://example.com/test#>

CONSTRUCT {
:cons.underived.rpt
        a sh:ValidationReport ;
        sh:conforms false ;
        sh:result [
                a sh:ValidationResult ;
                sh:focusNode ?this ;
                sh:resultMessage ":Event without derivation source" ;
                sh:resultSeverity sh:Violation ;
                sh:sourceShape :cons.underived ;
        ] .
}
WHERE {
        ?this a :Event .
        FILTER NOT EXISTS {
                ?this pav:derivedFrom ?some
        }
}
LIMIT 10000

Corresponds to

@prefix sh: <http://www.w3.org/ns/shacl#>
@prefix : <http://example.com/test#>

:Event-shape a sh:NodeShape ;
        sh:targetClass :Event ;
        sh:property [
                sh:path pav:derivedFrom ;
                sh:minCount 1
        ] .