diff --git a/draft/schemas/about.json b/draft/schemas/about.json
index ff23384..7736bea 100644
--- a/draft/schemas/about.json
+++ b/draft/schemas/about.json
@@ -7,30 +7,9 @@
   "items": {
     "type": "object",
     "properties": {
-      "type": {
-        "type": "string",
-        "enum": ["Concept"]
-      },
       "id": {
         "type": "string",
         "format": "uri"
-      },
-      "inScheme": {
-        "type": "object",
-        "properties": {
-          "id": {
-            "type": "string",
-            "enum": [
-              "https://w3id.org/kim/hochschulfaechersystematik/scheme",
-              "http://w3id.org/kim/schulfaecher/"
-            ]
-          }
-        }
-      },
-      "prefLabel": {
-        "title": "The preferred label of the concept",
-        "description": "A localized string for prefLabel of a SKOS concept",
-        "$ref": "https://w3id.org/kim/amb/draft/schemas/localizedString.json"
       }
     },
     "required": ["id"]