diff --git a/OntoMetadataShape.ttl b/OntoMetadataShape.ttl
index 7d4ee01..8052262 100644
--- a/OntoMetadataShape.ttl
+++ b/OntoMetadataShape.ttl
@@ -180,7 +180,7 @@ ontometa:OntologyMetadataShape a sh:NodeShape ;
             # [sh:hasValue <> ;] 
             );
         # sh:message """The ontology does not declare its own license. Please provide it, if known."""@en ; # optimized message for current TIB TS 
-        sh:message """You must provide exactly one ontology license.\nThe license must be open (Read more about open licenses at https://opendefinition.org/licenses/).\nThe license must be given as an IRI from the following list:\n    - <https://creativecommons.org/publicdomain/zero/1.0/>\n    - <https://creativecommons.org/licenses/by/4.0/>\n    - <http://opendatacommons.org/licenses/by/1.0/>\n    - <http://opendatacommons.org/licenses/by/summary/>\n    - <http://opendatacommons.org/licenses/pddl/summary/>\n    - <http://opendatacommons.org/licenses/pddl/1.0/>\n    - <http://creativecommons.org/licenses/by/4.0/legalcode>\n    - <http://creativecommons.org/licenses/by/3.0/legalcode>\n    - <https://creativecommons.org/publicdomain/zero/1.0/legalcode>\n    - <http://creativecommons.org/licenses/by-sa/4.0/>\n    - <http://creativecommons.org/licenses/by-sa/4.0/legalcode>\n    - <http://creativecommons.org/licenses/by-sa/3.0/legalcode>\n    - <http://opendatacommons.org/licenses/odbl/summary/>\n    - <http://opendatacommons.org/licenses/odbl/1.0/>\n    - <https://spdx.org/licenses/Unlicense.html>\nRecommended property: <http://purl.org/dc/terms/license>\nExample statement (text/turtle): <https://www.purl.org/SomeOntology> dcterms:license <http://creativecommons.org/licenses/by/4.0/> .\nYou want to use a different open license? File an issue at https://gitlab.com/TIBHannover/terminology/tib-terminology-service-issue-tracker/-/issues\nNeed help? Learn more about SHACL: https://www.w3.org/TR/2017/REC-shacl-20170720/"""@en ;
+        sh:message """You must provide exactly one ontology license.\nThe license must be open (Read more about open licenses at https://opendefinition.org/licenses/).\nThe license must be given as an IRI from the following list:\n\n    - <https://opendatacommons.org/licenses/by/1-0/>\n    - <https://opendatacommons.org/licenses/pddl/1-0/>\n    - <https://opendatacommons.org/licenses/odbl/1-0/>\n    - <https://unlicense.org/>\n    - <https://creativecommons.org/publicdomain/zero/1.0/legalcode>\n    - <https://creativecommons.org/licenses/by/3.0/legalcode>\n    - <https://creativecommons.org/licenses/by/4.0/legalcode>\n    - <https://creativecommons.org/licenses/by/3.0/de/legalcode>\n    - <https://creativecommons.org/licenses/by-sa/3.0/legalcode>\n    - <https://creativecommons.org/licenses/by-sa/4.0/legalcode>\n\nRecommended property: <http://purl.org/dc/terms/license>\nExample statement (text/turtle): <https://www.purl.org/SomeOntology> dcterms:license <http://creativecommons.org/licenses/by/4.0/> .\nYou want to use a different open license? File an issue at https://gitlab.com/TIBHannover/terminology/tib-terminology-service-issue-tracker/-/issues\nNeed help? Learn more about SHACL: https://www.w3.org/TR/2017/REC-shacl-20170720/"""@en ;
         sh:description "This shape checks whether the ontology provides a license IRI from a list of accepted open licenses. It produces a warning message if not."@en ;
         sh:name "Ontology license"@en ;
     ] ;
diff --git a/OntoMetadataShape4Forms.ttl b/OntoMetadataShape4Forms.ttl
index 24d384e..bcacc60 100644
--- a/OntoMetadataShape4Forms.ttl
+++ b/OntoMetadataShape4Forms.ttl
@@ -687,7 +687,7 @@ ontometa4forms:OntologyMetadataShape a sh:NodeShape ;
         sh:group ontometa4forms:RelatedResources ;
     ];
 
-## Related identifiers
+## Alternative identifiers of the ontology
 ### status: developer and external review needed
 
     sh:property [
@@ -729,7 +729,7 @@ ontometa4forms:OntologyMetadataShape a sh:NodeShape ;
         sh:severity sh:Info ;
         # sh:xone ( 
             # [
-                sh:nodeKind sh:IRI ;
+                sh:nodeKind sh:IRI ; # inconsistent with ontometa:
                 # ] 
             # [sh:datatype rdf:langString ; sh:languageIn   ( "en" "de" "ar" "bn" "cs" "da" "es" "fi" "fr" "hi" "it" "ja" "nl" "no" "pl" "ru" "sv" "tr" "uk" "zh")  ; # liste verlängern
             # ] );
@@ -788,7 +788,7 @@ ontometa4forms:OntologyMetadataShape a sh:NodeShape ;
         sh:path owl:versionInfo ;
         sh:severity sh:Info ;
         sh:maxCount 1 ;
-        sh:datatype xsd:string ;
+        sh:datatype xsd:string ; # not consistent with ontometa:
         sh:description "You can provide some textual information about the ontology version, e.g. a semantic versioning number as 2.0.1 or a date in xsd:date or xsd:dateTime format, e.g. 2024-11-26T18:00:01."@en ;
         sh:name "Ontology version information"@en ;
         sh:group ontometa4forms:VersionGroup ;