diff --git a/shopelectro/context.py b/shopelectro/context.py
index 572e9a6b..7383cae5 100644
--- a/shopelectro/context.py
+++ b/shopelectro/context.py
@@ -4,8 +4,11 @@
 It stands between urls and view functions.
 
 Every context class is used via objects composition.
-For example:
-TODO - add example of objects composition
+Code example to create tagged:
+
+>>> from django.http import HttpRequest
+>>> url_kwargs = {'slug': 'my-page'}
+>>> Category(url_kwargs, request=HttpRequest()) | TaggedCategory()
 """
 
 import typing
diff --git a/shopelectro/views/catalog.py b/shopelectro/views/catalog.py
index f8098f1f..3e97f214 100644
--- a/shopelectro/views/catalog.py
+++ b/shopelectro/views/catalog.py
@@ -193,8 +193,8 @@ def get_context_data(self, **kwargs):
             context.Category(self.kwargs, self.request)
             | context.TaggedCategory()
             | context.SortingCategory()
-            | context.PaginationCategory()
-            | context.DBTemplate()
+            | context.PaginationCategory()  # requires SortingCategory
+            | context.DBTemplate()  # requires TaggedCategory
         )
         return {
             **super().get_context_data(**kwargs),