@base <http://example.org/> .
@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. 
# It does not validate the constraints
#

<CubeShape>
    a sh:NodeShape ;
    sh:targetClass cube:Cube ;
    sh:or(
            [
		        sh:path schema:name;
                sh:minCount 1;
                sh:datatype xsd:string;
                sh:message "cube:Cube needs a schema:name"
            ]
            [
		        sh:path schema:name;
                sh:minCount 1;
                sh:datatype rdf:langString;
                sh:message "cube:Cube needs a schema:name"
            ]
    );
    sh:property [
        sh:path schema:publisher ;
        sh:minCount 1 ;
        sh:nodeKind sh:IRI ;
        sh:message "cube:Cube needs an schema:publisher"
    ] ;
    sh:property [
        sh:path schema:creator ;
        sh:minCount 1 ;
        sh:nodeKind sh:IRI ;
        sh:message "cube:Cube needs an schema:creator"
    ] ;
    sh:property [
        sh:path schema:contactPoint ;
        sh:minCount 1 ;
        sh:nodeKind sh:IRI ;
        sh:message "cube:Cube needs an schema:contactpoint"
    ] ;
    sh:property [
        sh:path schema:contributor ;
        sh:minCount 1 ;
        sh:nodeKind sh:IRI ;
        sh:message "cube:Cube needs an schema:contributor"
    ] ;
    sh:property [
        sh:path schema:dateCreated ;
        sh:minCount 1 ;
        sh:datatype xsd:date;
        sh:message "cube:Cube needs a valid schema:dateCreated"
    ] ;
    sh:property [
        sh:path schema:datePublished ;
        sh:minCount 1 ;
        sh:datatype xsd:date;
        sh:message "cube:Cube needs a valid schema:datePublished"
    ] ;
    sh:property [
        sh:path schema:dateModified ;
        sh:minCount 1 ;
        sh:datatype xsd:date;
        sh:message "cube:Cube needs a valid schema:dateModified"
    ] ;
    sh:property [
        sh:path cube:observationSet ;
        sh:minCount 1 ;
        sh:node <ObservationSetShape> ;
        sh:message "cube:Cube needs an observationSet"
    ];
    sh:property [
        # optional, but recommended
        sh:path cube:observationConstraint ;
        sh:message "cube:Cube must point to a valid constraint"
    ] 
    .

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

<ObservationShape>
    a sh:NodeShape ;
    sh:targetClass cube:Observation ;
    sh:property [
        sh:path cube:observedBy ;
        sh:minCount 1 ;
        sh:nodeKind sh:IRI ;
        sh:message "cube:Observation requires cube:observedBy"
    ] .