diff --git a/luxtronik/data_vector.py b/luxtronik/data_vector.py
index c1deb7bf..21f3bdc5 100644
--- a/luxtronik/data_vector.py
+++ b/luxtronik/data_vector.py
@@ -35,8 +35,34 @@ def __iter__(self):
 
     @property
     def data(self):
+        """
+        Return the internal `LuxtronikFieldsDictionary`.
+        Please check its documentation.
+        """
         return self._data
 
+    def __getitem__(self, def_name_or_idx):
+        """
+        Array-style access to method `get`.
+        Please check its documentation.
+        """
+        return self.get(def_name_or_idx)
+
+    def __setitem__(self, def_name_or_idx, value):
+        """
+        Array-style access to method `set`.
+        Please check its documentation.
+        """
+        return self.set(def_name_or_idx, value)
+
+
+    def __contains__(self, def_field_name_or_idx):
+        """
+        Forward the `LuxtronikFieldsDictionary.__contains__` method.
+        Please check its documentation.
+        """
+        return def_field_name_or_idx in self._data
+
     def _name_lookup(self, name):
         """
         Try to find the index using the given field name.
@@ -94,3 +120,7 @@ def get(self, target):
         """Get entry by id or name."""
         entry = self._lookup(target)
         return entry
+
+    def set(self, target, value):
+        "TODO: Placeholder for future changes"
+        pass
diff --git a/luxtronik/shi/vector.py b/luxtronik/shi/vector.py
index 723aa4c9..36e7d39b 100644
--- a/luxtronik/shi/vector.py
+++ b/luxtronik/shi/vector.py
@@ -143,32 +143,12 @@ def empty(cls, version=LUXTRONIK_LATEST_SHI_VERSION, safe=True):
         obj._init_instance(version, safe)
         return obj
 
-    def __getitem__(self, def_name_or_idx):
-        return self.get(def_name_or_idx)
-
-    def __setitem__(self, def_name_or_idx, value):
-        return self.set(def_name_or_idx, value)
-
     def __len__(self):
         return len(self._data.pairs())
 
     def __iter__(self):
         return iter([definition for definition, _ in self._data.pairs()])
 
-    def __contains__(self, def_field_name_or_idx):
-        """
-        Check whether the data vector contains a name, index,
-        or definition matching an added field, or the field itself.
-
-        Args:
-            def_field_name_or_idx (LuxtronikDefinition | Base | str | int):
-                Definition object, field object, field name or register index.
-
-        Returns:
-            True if the searched element was found, otherwise False.
-        """
-        return def_field_name_or_idx in self._data
-
 
 # properties and access methods ###############################################