@prefix ecv: <https://example.org/ecv#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

ecv:CapabilityShape
  a sh:NodeShape ;
  sh:targetClass ecv:Capability ;
  sh:property [
    sh:path ecv:hasRequirement ;
    sh:minCount 1 ;
    sh:class ecv:Requirement ;
    sh:message "Capabilities should declare at least one requirement."@en
  ] ;
  sh:property [
    sh:path ecv:hasConstraint ;
    sh:class ecv:Constraint ;
    sh:message "Constraints linked from capabilities must be typed as ecv:Constraint."@en
  ] .

ecv:ConstraintShape
  a sh:NodeShape ;
  sh:targetClass ecv:Constraint ;
  sh:property [
    sh:path ecv:maxRequests ;
    sh:datatype xsd:integer ;
    sh:maxCount 1 ;
    sh:message "A constraint may declare one integer maxRequests value."@en
  ] .