architecture update, need to implement

docs/UML/core.pu

@@ -13,23 +13,21 @@ class City  #white {
 }
 
 class Country #white {
-    # iso_code : string{2}
-    + name : string
-    + area : string
-}
-
-class Region #white {
-    # iso_code : string {3}
+    # iso_alpha2_code : string{2}
     + name : string
+    + region_code : string{3}
+    + region_name : string
+    + sub_region_code : string{3}
+    + sub_region_name : string
+    + intermediate_region_code : string{3}
+    + intermediate_region_name : string
 }
 
 City "*" -left-* Country
-Country "*" -right- "1" Region
-Region "*" -- "0..1" Region
 
-note "Countries and Regions \n are intially hardcoded \n in the db." as N2
-Region .. N2
-N2 .. Country
+
+note "Countries are intially \n hardcoded in the db." as N2
+N2 .up. Country
 
 class University  #wheat {
     + name : string