fixing missing type keyword

metadata_tools/resources/elu-dataset.json

@@ -36,8 +36,8 @@
       "elu:storage": {
         "type": "object",
         "properties": {
-          "platform": "string",
-          "location": "string",
+          "platform": {"type": "string"},
+          "location": {"type": "string"},
           "accesses": {
             "type": "array",
             "items": {
@@ -48,8 +48,8 @@
         "elu:transfer": {
           "type": "object",
           "properties": {
-            "partner": "string",
-            "transfer_details": "string",
+            "partner": {"type": "string"},
+            "transfer_details": {"type": "string"},
             "transfer_date": {
               "type": "string",
               "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}$"