diff --git a/pagexml/model/physical_document_model.py b/pagexml/model/physical_document_model.py
index 8f1ced2..511d9f4 100644
--- a/pagexml/model/physical_document_model.py
+++ b/pagexml/model/physical_document_model.py
@@ -348,10 +348,10 @@ def __init__(self, doc_id: Union[None, str] = None, doc_type: Union[None, str, L
         self.type = doc_type
         self.main_type = 'doc'
         self.metadata = metadata if metadata else {}
-        if self.id and 'id' not in self.metadata:
-            self.metadata['id'] = self.id
-        if self.metadata and 'type' not in self.metadata:
-            self.metadata['type'] = self.type
+        # if self.id and 'id' not in self.metadata:
+        #     self.metadata['id'] = self.id
+        # if self.metadata and 'type' not in self.metadata:
+        #     self.metadata['type'] = self.type
         self.reading_order: Dict[int, str] = reading_order if reading_order else {}
         self.reading_order_number = {}
         self.parent: Union[StructureDoc, None] = None
diff --git a/tests/physical_document_model_test.py b/tests/physical_document_model_test.py
index 320a943..00c3940 100644
--- a/tests/physical_document_model_test.py
+++ b/tests/physical_document_model_test.py
@@ -124,7 +124,7 @@ def test_json(self):
         json_data = doc.json
         self.assertEqual('doc1', json_data['id'])
         self.assertEqual('book', json_data['type'])
-        self.assertEqual({'title': 'The Great Gatsby', 'id': 'doc1', 'type': 'book'}, json_data['metadata'])
+        self.assertEqual({'title': 'The Great Gatsby'}, json_data['metadata'])
         self.assertEqual({}, json_data.get('reading_order', {}))
 
         doc.reading_order = {1: 'page1', 2: 'page2', 3: 'page3'}
@@ -156,7 +156,7 @@ def test_json(self):
         expected_json = {
             'id': 'doc1',
             'type': 'book',
-            'metadata': {'author': 'Jane Doe', 'id': 'doc1', 'type': 'book'},
+            'metadata': {'author': 'Jane Doe'},
             'coords': [(0, 0), (0, 10), (10, 10), (10, 0)]
         }
         self.assertEqual(expected_json, self.doc.json)