ENH: updated json schema for yaml data model definition

src/caosadvancedtools/models/schema-model.yml

+model:
   type: object
   properties:
     __line__:
       type: integer
+    extern:
+      type: object
   additionalProperties:
+    $ref:
+      "#/$defs/record_type"
+  $defs:
+    property:
+      type: object
+      properties:
+        datatype:
+          type: string
+        unit:
+          type: string
+        value:
+          type: string
+        description:
+          type: string
+        inherit_from_obligatory:
+          type: array
+          items:
+            type: string
+        inherit_from_suggested:
+          type: array
+          items:
+            type: string
+        inherit_from_recommended:
+          type: array
+          items:
+            type: string
+        __line__:
+          type: integer
+    record_type:
       type: object
       properties:
         obligatory_properties:
           type: object
+          properties:
+            oneOf:
+            - type: string
+            - $ref: "#/$defs/property"
         recommended_properties:
           type: object
+          properties:
+            oneOf:
+            - type: string
+            - $ref: "#/$defs/property"
         suggested_properties:
           type: object
-    datatype:
-      type: string
+          properties:
+            oneOf:
+            - type: string
+            - $ref: "#/$defs/property"
         description:
           type: string
+        role:
+          type:
+            enum:
+            - RecordType
+            - Record
+            - File
+            - Property
         inherit_from_obligatory:
-      type: object
+          type: array
+          items:
+            type: string
         inherit_from_suggested:
-      type: object
+          type: array
+          items:
+            type: string
         inherit_from_recommended:
-      type: object
+          type: array
+          items:
+            type: string
         __line__:
           type: integer
       additionalProperites: false
+