Add SHACL shape for DCAT-AP Feeds

shape.ttl

@@ -0,0 +1,54 @@
+@prefix dcatapfeeds: <https://semiceu.github.io/LDES-DCAT-AP-Feeds/shape.ttl#> .
+@prefix sh: <http://www.w3.org/ns/shacl#> .
+@prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix tree: <https://w3id.org/tree#> .
+@prefix as: <https://www.w3.org/ns/activitystreams#> .
+@prefix : <http://data.europa.eu/r5r/shacl_shapes#> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
+
+dcatapfeeds: owl:imports <https://semiceu.github.io/DCAT-AP/releases/3.0.0/html/shacl/shapes.ttl> .
+
+dcatapfeeds:ActivityShape a sh:NodeShape ;
+    sh:xone ( dcatapfeeds:UpsertShape dcatapfeeds:DeleteShape ) .
+
+dcatapfeeds:UpsertShape a sh:NodeShape ;
+	sh:closed true ;
+	sh:ignoredProperties (rdf:type) ;
+	sh:targetClass as:Create, as:Update ;
+	sh:property [
+		sh:path as:object ;
+		sh:node dcatapfeeds:EntityShape ;
+		sh:minCount 1 ;
+		sh:maxCount 1 ;
+	] ;
+	sh:property dcatapfeeds:PublishedPropertyShape .
+
+dcatapfeeds:DeleteShape a sh:NodeShape ;
+	sh:closed true ;
+	sh:ignoredProperties (rdf:type) ;
+	sh:targetClass as:Delete ;
+	sh:property [
+		sh:path as:object ;
+		sh:nodeKind sh:IRI ;
+		sh:minCount 1 ;
+		sh:maxCount 1 ;
+	] ;
+	sh:property dcatapfeeds:PublishedPropertyShape .
+
+dcatapfeeds:PublishedPropertyShape a sh:PropertyShape ;
+	sh:path as:published ;
+	sh:datatype xsd:dateTime ;
+	sh:minCount 0 ;
+	sh:maxCount 1 .
+
+
+dcatapfeeds:EntityShape a sh:NodeShape ;
+sh:xone ( :Catalog_Shape :Dataset_Shape :Distribution_Shape :DataService_Shape :Agent_Shape :Kind_Shape :LicenseDocument_Shape ) .
+
+:Kind_Shape a sh:NodeShape ;
+	rdfs:label "Kind"@en ;
+	rdfs:comment “Placeholder shape for vcard:Kind, currently not present in DCAT-AP v3 shapes” ;
+	sh:targetClass vcard:Kind .

spec.bs

@@ -18,7 +18,7 @@ Abstract:
 
 # Publishing changes about DCAT-AP entities # {#feed}
 
-A DCAT-AP Feed is a Linked Data Event Stream with ActivityStream entities Create, Update and Deletes in it about the DCAT-AP entities in a catalog.
+A DCAT-AP Feed is a Linked Data Event Stream with ActivityStream entities Create, Update and Delete in it about the DCAT-AP entities in a catalog.
 DCAT-AP Feeds uses the [[!activitystreams-vocabulary]] to indicate the type of change.
 Three type of activities can be described: 
  * a Create (i) or an Update (ii), both upserting a set of quads, packaged in a named graph, in the harvester, and