#222, #288: Update SHACL-SHACL for general NodeExpression and SelectExpression

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

shacl12-vocabularies/shacl-shacl.ttl

@@ -84,10 +84,6 @@ shsh:ShapeShape
 	# Shapes are either node shapes or property shapes
 	sh:xone ( shsh:NodeShapeShape shsh:PropertyShapeShape ) ;
 
-	sh:property [
-		sh:path sh:targetNode ;
-		sh:nodeKind	sh:IRIOrLiteral ;   # targetNode-nodeKind
-	] ; 
 	sh:property [
 		sh:path sh:targetClass ;
 		sh:nodeKind sh:IRI ;            # targetClass-nodeKind
@@ -409,3 +405,14 @@ shsh:EntailmentShape
 	a sh:NodeShape ;
 	sh:targetObjectsOf sh:entailment ;
 	sh:nodeKind sh:IRI .                # entailment-nodeKind
+
+shsh:SelectExpressionShape
+	a sh:NodeShape ;	# SelectExpression-syntax
+	sh:targetClass sh:SelectExpression ;
+	sh:targetSubjectsOf sh:select ;
+	sh:nodeKind sh:BlankNode ;
+	sh:property [
+		sh:datatype xsd:string ;
+		sh:maxCount 1 ;
+		sh:path sh:select ;
+	] .