diff --git a/models/application/document.json b/models/application/document.json
index df5106a975faca8c6d8e6846ae11e2d1a4373094..f79c70c568602a469276a475a3841d95125879c9 100644
--- a/models/application/document.json
+++ b/models/application/document.json
@@ -3,6 +3,24 @@
   "title": "Application Document",
   "description": "Ein im Antrag (Application) enthaltenes Dokument (z.B. Antragsformular oder hochgeladene Anlage)",
   "additionalProperties": false,
+  "x-examples": {
+    "example-1": {
+      "docId": "1",
+      "purpose": "form",
+      "size": 13046,
+      "mimeType": "application/pdf",
+      "filename": "test.pdf",
+      "description": "Das Antragsformular",
+      "lang": {
+        "lang": "de",
+        "region": "DE"
+      },
+      "hash": {
+        "algorithm": "SHA-256",
+        "digest": "bf37d894fdf9aeade63975ed648d49c3e8a7a773923597d2418915f54cd7c3b9"
+      }
+    }
+  },
   "properties": {
     "purpose": {
       "type": "string",
@@ -53,10 +71,8 @@
       ]
     },
     "signature": {
-      "pattern": {
-        "$ref": "../common/base64url.json#/pattern"
-      },
       "type": "string",
+      "pattern": "^[a-zA-Z0-9-_=]+$",
       "description": "Sofern der Antragstellers dieses Dokument signiert hat, wird die Signatur hier base64url-encoded eingebettet"
     },
     "mimeType": {
@@ -72,23 +88,5 @@
     "purpose",
     "size",
     "mimeType"
-  ],
-  "x-examples": {
-    "example-1": {
-      "docId": "1",
-      "purpose": "form",
-      "size": 13046,
-      "mimeType": "application/pdf",
-      "filename": "test.pdf",
-      "description": "Das Antragsformular",
-      "lang": {
-        "lang": "de",
-        "region": "DE"
-      },
-      "hash": {
-        "algorithm": "SHA-256",
-        "digest": "bf37d894fdf9aeade63975ed648d49c3e8a7a773923597d2418915f54cd7c3b9"
-      }
-    }
-  }
+  ]
 }
\ No newline at end of file