diff --git a/shacl12-vocabularies/shacl-shacl.ttl b/shacl12-vocabularies/shacl-shacl.ttl
index c8006175..837d8f76 100644
--- a/shacl12-vocabularies/shacl-shacl.ttl
+++ b/shacl12-vocabularies/shacl-shacl.ttl
@@ -111,6 +111,7 @@ shsh:ShapeShape
 	sh:targetSubjectsOf sh:uniqueLang ;
 	sh:targetSubjectsOf sh:uniqueMembers ;
 	sh:targetSubjectsOf sh:xone ;
+  sh:targetSubjectsOf sh:singleLine ;
 
 	sh:targetObjectsOf sh:memberShape ; # memberShape-node
 	sh:targetObjectsOf sh:node ;        # node-node
@@ -295,6 +296,11 @@ shsh:ShapeShape
 		sh:maxCount 1 ;                 # multiple-parameters
 		# Not implemented: syntax rule pattern-regex
 	] ;
+	sh:property [
+		sh:path sh:singleLine ;
+		sh:datatype xsd:boolean ;	# singleLine-datatype
+		sh:maxCount 1 ;                 # multiple-parameters
+	] ;
 	sh:property [
 		sh:path sh:flags ;
 		sh:datatype xsd:string ;        # flags-datatype