diff --git a/script/sql/create/operation.sql b/script/sql/create/operation.sql
index 2f105e6..5ad2071 100644
--- a/script/sql/create/operation.sql
+++ b/script/sql/create/operation.sql
@@ -1,3 +1,5 @@
+CREATE TYPE API_OPERATION AS ENUM ('add', 'delete', 'update');
+
 CREATE TABLE OPERATION
 (
   ID SERIAL PRIMARY KEY
@@ -5,6 +7,11 @@ CREATE TABLE OPERATION
 , Undo TEXT NOT NULL
 , Parent INTEGER REFERENCES OPERATION(ID)
 , Redo_Child INTEGER REFERENCES OPERATION(ID)
+, Api TEXT NOT NULL
+, Api_Operation API_OPERATION NOT NULL
+, Api_Operation_Type TEXT NOT NULL
+, Api_Operation_Id TEXT NOT NULL -- VARCHAR(32)
+, Api_Operation_Property TEXT NOT NULL
 );
 
 INSERT INTO OPERATION (ID, Redo, Undo) VALUES (0, '', '');