diff --git a/ckanext/odsh/scheming/dataset.json b/ckanext/odsh/scheming/dataset.json
index 7074d40469bbd7cf2ae92417e91335b043d9c3d7..90279eaac5bd0ffb387353e6784f787fa7dd4b26 100644
--- a/ckanext/odsh/scheming/dataset.json
+++ b/ckanext/odsh/scheming/dataset.json
@@ -11,13 +11,15 @@
         "de": "Titel"
       },
       "preset": "title",
-      "form_placeholder": "z. B. ein beschreibender Titel"
+      "form_placeholder": "z. B. ein beschreibender Titel",
+      "required": true
     },
     {
       "field_name": "name",
       "label": "URL",
       "preset": "dataset_slug",
-      "form_placeholder": "z. B. mein-datensatz"
+      "form_placeholder": "z. B. mein-datensatz",
+      "required": true
     },
     {
       "field_name": "notes",
@@ -26,7 +28,8 @@
         "de": "Beschreibung"
       },
       "form_snippet": "markdown.html",
-      "form_placeholder": "z. B. einige nützliche Hinweise zu den Daten"
+      "form_placeholder": "z. B. einige nützliche Hinweise zu den Daten",
+      "required": false
     },
     {
       "field_name": "owner_org",
@@ -34,7 +37,8 @@
         "en": "Organization",
         "de": "Herausgeber"
       },
-      "preset": "dataset_organization"
+      "preset": "dataset_organization",
+      "required": true
     },
     {
       "field_name": "license_id",
@@ -43,14 +47,16 @@
         "de": "Lizenz"
       },
       "form_snippet": "license.html",
-      "help_text": "Lizenzdefinitionen und weitere Informationen finden Sie unter http://opendefinition.org/"
+      "help_text": "Lizenzdefinitionen und weitere Informationen finden Sie unter http://opendefinition.org/",
+      "required": true
     },
     {
       "field_name": "license_attribution",
       "label": {
         "en": "License attribution",
         "de": "Lizenzhinweis"
-      }
+      },
+      "required": false
     },
     {
       "field_name": "temporal_start",
@@ -59,7 +65,7 @@
         "de": "Zeitraum von"
       },
       "preset": "date",
-      "required": false
+      "required": true
     },
     {
       "field_name": "temporal_end",
@@ -86,7 +92,8 @@
         "de": "Schlagwörter"
       },
       "preset": "tag_string_autocomplete",
-      "form_placeholder": "z. B. Wirtschaft, geistige Gesundheit, Regierung"
+      "form_placeholder": "z. B. Wirtschaft, geistige Gesundheit, Regierung",
+      "required": false
     },
     {
       "field_name": "spatial_uri",
@@ -153,7 +160,8 @@
         "en": "Reference dataset",
         "de": "Musterdatensatz"
       },
-      "display_snippet": "reference.html"
+      "display_snippet": "reference.html",
+      "required": false
     },
     {
       "field_name": "version_notes",
@@ -162,7 +170,8 @@
         "de": "Hinweise zur Version"
       },
       "form_snippet": "markdown.html",
-      "form_placeholder": "z. B. einige nützliche Hinweise zu der Version"
+      "form_placeholder": "z. B. einige nützliche Hinweise zu der Version",
+      "required": false
     },
     {
       "field_name": "is_replaced_by",
@@ -171,7 +180,8 @@
         "de": "Wird ersetzt durch"
       },
       "display_snippet": "link.html",
-      "form_placeholder": "https://"
+      "form_placeholder": "https://",
+      "required": false
     },
     {
       "field_name": "author",
@@ -180,7 +190,8 @@
         "de": "Autor"
       },
       "form_placeholder": "Erika Mustermann",
-      "display_property": "dc:creator"
+      "display_property": "dc:creator",
+      "required": false
     },
     {
       "field_name": "author_email",
@@ -191,7 +202,8 @@
       "form_placeholder": "erika@example.com",
       "display_property": "dc:creator",
       "display_snippet": "email.html",
-      "display_email_name_field": "author"
+      "display_email_name_field": "author",
+      "required": false
     },
     {
       "field_name": "maintainer",
@@ -200,7 +212,8 @@
         "de": "Verwalter"
       },
       "form_placeholder": "Erika Mustermann",
-      "display_property": "dc:contributor"
+      "display_property": "dc:contributor",
+      "required": false
     },
     {
       "field_name": "maintainer_email",
@@ -211,7 +224,8 @@
       "form_placeholder": "erika@example.com",
       "display_property": "dc:contributor",
       "display_snippet": "email.html",
-      "display_email_name_field": "maintainer"
+      "display_email_name_field": "maintainer",
+      "required": false
     }
   ],
   "resource_fields": [