@prefix : <https://cube.link/shape/basic-cube-constraint#> .
@prefix dash: <http://datashapes.org/dash#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix cube: <https://cube.link/> .

#
# This is the bare minimal SHACL shape for validating a cube.
# All cubes should pass this validation.
#

:CubeShape
    a sh:NodeShape ;
    sh:targetClass cube:Cube ;
    sh:property [
        sh:path cube:observationSet ;
        sh:minCount 1 ;
        sh:node :ObservationSetShape ;
        sh:message "cube:Cube needs at least one cube:ObservationSet"
    ] ;
    sh:property [
        # optional, but recommended
        sh:path cube:observationConstraint ;
        sh:node :ObservationConstraintShape ;
        sh:message "cube:Cube must point to a valid cube:Constraint"
    ] .

:ObservationSetShape
    a sh:NodeShape ;
    sh:targetClass cube:ObservationSet ;
    sh:property [
        sh:path cube:observation ;
        sh:minCount 1 ;
        sh:message "cube:ObservationSet needs at least one cube:observation"
    ] .

:ObservationConstraintShape
    a sh:NodeShape ;
    sh:targetClass cube:Constraint ;
    sh:property [
        # we assume at least 3 dimensions, otherwise we would have an empty list of dimensions
        # one for cube:observedBy, one for rdf:type and at least one cube dimension
        sh:path sh:property ;
        sh:minCount 3 ;
        sh:message "cube:Constraint needs at least a certain amount of sh:properties"
    ] .