diff --git a/app/alchemy/base.plantuml b/app/alchemy/base.plantuml
index 8f39b6d..a2514d4 100644
--- a/app/alchemy/base.plantuml
+++ b/app/alchemy/base.plantuml
@@ -4,23 +4,21 @@
 top to bottom direction
 skinparam linetype ortho
 
-abstract Base {
-    id\t\t\t\tInteger\t\t<<Primary>>  {field}
-  # __tablename__\tto_snake_case(__name__)    {field}
-}
-'abstract DeclarativeBase {
-'  + registry
-'  + metadata
-'  # __name__
-'  # __mapper__
-'  # __table__
-'  # __tablename__
-'  # __mapper_args__
-'  # __table_args__
-'  - _sa_registry
-'  - _sa_inspect_type()
-'  - _sa_inspect_instance()
-'}
-'
-'DeclarativeBase <|-- Base
+package base {
+
+  abstract Base {
+    + id\t\t\t\tInteger\t\t<<PK>>  {field}
+    # __tablename__\tstr   {field}
+  }
+
+  object to_snake_case {
+    name\tstr
+  }
+
+  object bidirectional_relationship {
+    cls\t\t\t\tclass
+    foreign_table_cls\tclass
+  }
+
+ }
 @enduml
diff --git a/app/alchemy/base.py b/app/alchemy/base.py
index 78e430f..47506b1 100644
--- a/app/alchemy/base.py
+++ b/app/alchemy/base.py
@@ -37,7 +37,3 @@ class Base(DeclarativeBase):
         return to_snake_case(cls.__name__)
 
 
-# noinspection PyPep8Naming
-
-
-