fix(ro-crate): 🩹 define ROCrateMetadataFileDescriptor class in the ontology and use sh:targetClass

Author: kikkomep

rocrate_validator/profiles/ro-crate/must/1_file-descriptor_metadata.ttl

@@ -73,17 +73,7 @@ ro-crate:ROCrateMetadataFileDescriptorRecommendedProperties a sh:NodeShape ;
     sh:name "RO-Crate Metadata File Descriptor REQUIRED properties" ;
     sh:description """RO-Crate Metadata Descriptor MUST be defined
     according with the requirements details defined in [RO-Crate Metadata File Descriptor](https://www.researchobject.org/ro-crate/1.1/root-data-entity.html#ro-crate-metadata-file-descriptor)""" ;
-    sh:target [
-        a sh:SPARQLTarget ;
-        sh:prefixes ro-crate:sparqlPrefixes ;
-        sh:select """
-            SELECT ?this
-            WHERE {
-                ?this ?p ?o .
-                FILTER( STRENDS(STR(?this), "ro-crate-metadata.json") )
-            }
-        """ ;
-    ] ;
+    sh:targetClass ro-crate:ROCrateMetadataFileDescriptor ;
     sh:property [
         a sh:PropertyShape ;
         sh:name "Metadata File Descriptor entity type" ;

rocrate_validator/profiles/ro-crate/ontology.ttl

@@ -31,6 +31,11 @@
 # # #    Classes
 # # #################################################################
 
+# Declare the ROCrateMetadataFileDescriptor class
+ro-crate:ROCrateMetadataFileDescriptor rdf:type owl:Class ;
+  rdfs:subClassOf schema:CreativeWork ;
+  rdfs:label "ROCrateMetadataFileDescriptor"@en .
+
 # Declare the RootDataEntity class
 ro-crate:RootDataEntity rdf:type owl:Class ;
   rdfs:subClassOf schema:Dataset ;
@@ -65,3 +70,12 @@ ro-crate:DataEntity rdf:type owl:Class ;
 ro-crate:Directory rdf:type owl:Class ;
                 rdfs:subClassOf schema:Dataset ;
                 rdfs:label "Directory"@en .
+
+
+# # #################################################################
+# # #    Individuals
+# # ##############################################################
+
+# Declare the individual representing the RO-Crate Metadata File Descriptor entity
+ro:ro-crate-metadata.json a owl:NamedIndividual, ro-crate:ROCrateMetadataFileDescriptor .
+