diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index c52557a255..2a31611886 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -31,7 +31,7 @@ set(ALL_SQL_IN "${CMAKE_CURRENT_BINARY_DIR}/all.sql.in")
 set(PROJ_DB "${CMAKE_CURRENT_BINARY_DIR}/proj.db")
 include(sql_filelist.cmake)
 
-set(PROJ_DB_SQL_EXPECTED_MD5 "6488d04f52652b2a7214ea6cb1caf62c")
+set(PROJ_DB_SQL_EXPECTED_MD5 "d5e48d79a5938158915c39144ec86f99")
 
 add_custom_command(
   OUTPUT ${PROJ_DB}
diff --git a/data/sql/nkg.sql b/data/sql/nkg.sql
index 6e6111701c..6de253506c 100644
--- a/data/sql/nkg.sql
+++ b/data/sql/nkg.sql
@@ -1,6 +1,6 @@
 INSERT INTO "metadata" VALUES('NKG.SOURCE', 'https://github.com/NordicGeodesy/NordicTransformations');
-INSERT INTO "metadata" VALUES('NKG.VERSION', '1.0.1');
-INSERT INTO "metadata" VALUES('NKG.DATE', '2024-04-02');
+INSERT INTO "metadata" VALUES('NKG.VERSION', '1.0.w');
+INSERT INTO "metadata" VALUES('NKG.DATE', '2025-02-13');
 
 -- extent for NKG2008 transformations
 INSERT INTO "extent" VALUES(
@@ -181,10 +181,10 @@ INSERT INTO "usage" VALUES (
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_NKG_ETRF00', 2, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_NKG_ETRF00', 3, 'NKG', 'NKG_ETRF00_TO_ETRF2000')
+    ('NKG', 'ITRF2000_TO_NKG_ETRF00', 2, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_NKG_ETRF00', 3, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse')
 ;
 
 
@@ -252,10 +252,10 @@ INSERT INTO "usage" VALUES (
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_NKG_ETRF14', 2, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_NKG_ETRF14', 3, 'NKG', 'NKG_ETRF14_TO_ETRF2014')
+    ('NKG', 'ITRF2014_TO_NKG_ETRF14', 2, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_NKG_ETRF14', 3, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse')
 ;
 
 
@@ -844,10 +844,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_DK', 1, 'NKG', 'P1_2008_DK'),
-    ('NKG', 'ETRF00_TO_DK', 2, 'NKG', 'ETRF92_2000_TO_ETRF92_1994')
+    ('NKG', 'ETRF00_TO_DK', 1, 'NKG', 'P1_2008_DK', 'forward'),
+    ('NKG', 'ETRF00_TO_DK', 2, 'NKG', 'ETRF92_2000_TO_ETRF92_1994', 'forward')
 ;
 
 
@@ -878,12 +878,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_DK', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_DK', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_DK', 3, 'NKG', 'P1_2008_DK'),
-    ('NKG', 'ITRF2000_TO_DK', 4, 'NKG', 'ETRF92_2000_TO_ETRF92_1994')
+    ('NKG', 'ITRF2000_TO_DK', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_DK', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_DK', 3, 'NKG', 'P1_2008_DK', 'forward'),
+    ('NKG', 'ITRF2000_TO_DK', 4, 'NKG', 'ETRF92_2000_TO_ETRF92_1994', 'forward')
 ;
 
 
@@ -949,10 +949,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_EE', 1, 'NKG', 'P1_2008_EE'),
-    ('NKG', 'ETRF00_TO_EE', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_56')
+    ('NKG', 'ETRF00_TO_EE', 1, 'NKG', 'P1_2008_EE', 'forward'),
+    ('NKG', 'ETRF00_TO_EE', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_56', 'forward')
 ;
 
 
@@ -983,12 +983,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_EE', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_EE', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_EE', 3, 'NKG', 'P1_2008_EE'),
-    ('NKG', 'ITRF2000_TO_EE', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_56')
+    ('NKG', 'ITRF2000_TO_EE', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_EE', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_EE', 3, 'NKG', 'P1_2008_EE', 'forward'),
+    ('NKG', 'ITRF2000_TO_EE', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_56', 'forward')
 ;
 
 
@@ -1092,12 +1092,12 @@ VALUES
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_FI', 1, 'NKG', 'P1_2008_FI'),
-    ('NKG', 'ETRF00_TO_FI', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997'),
-    ('NKG', 'ETRF00_TO_EUREF-FIN', 1, 'NKG', 'P1_2008_FI'),
-    ('NKG', 'ETRF00_TO_EUREF-FIN', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_EUREF-FIN')
+    ('NKG', 'ETRF00_TO_FI', 1, 'NKG', 'P1_2008_FI', 'forward'),
+    ('NKG', 'ETRF00_TO_FI', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997', 'forward'),
+    ('NKG', 'ETRF00_TO_EUREF-FIN', 1, 'NKG', 'P1_2008_FI', 'forward'),
+    ('NKG', 'ETRF00_TO_EUREF-FIN', 2, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_EUREF-FIN', 'forward')
 ;
 
 
@@ -1147,16 +1147,16 @@ INSERT INTO "concatenated_operation" VALUES
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_FI', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_FI', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_FI', 3, 'NKG', 'P1_2008_FI'),
-    ('NKG', 'ITRF2000_TO_FI', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997'),
-    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 3, 'NKG', 'P1_2008_FI'),
-    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_EUREF-FIN')
+    ('NKG', 'ITRF2000_TO_FI', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_FI', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_FI', 3, 'NKG', 'P1_2008_FI', 'forward'),
+    ('NKG', 'ITRF2000_TO_FI', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997', 'forward'),
+    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 3, 'NKG', 'P1_2008_FI', 'forward'),
+    ('NKG', 'ITRF2000_TO_FI_EUREF-FIN', 4, 'NKG', 'ETRF96_2000_TO_ETRF96_1997_EUREF-FIN', 'forward')
 ;
 
 
@@ -1234,10 +1234,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_LV', 1, 'NKG', 'P1_2008_LV'),
-    ('NKG', 'ETRF00_TO_LV', 2, 'NKG', 'ETRF89_2000_TO_ETRF89_1992')
+    ('NKG', 'ETRF00_TO_LV', 1, 'NKG', 'P1_2008_LV', 'forward'),
+    ('NKG', 'ETRF00_TO_LV', 2, 'NKG', 'ETRF89_2000_TO_ETRF89_1992', 'forward')
 ;
 
 
@@ -1268,12 +1268,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_LV', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_LV', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_LV', 3, 'NKG', 'P1_2008_LV'),
-    ('NKG', 'ITRF2000_TO_LV', 4, 'NKG', 'ETRF89_2000_TO_ETRF89_1992')
+    ('NKG', 'ITRF2000_TO_LV', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_LV', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_LV', 3, 'NKG', 'P1_2008_LV', 'forward'),
+    ('NKG', 'ITRF2000_TO_LV', 4, 'NKG', 'ETRF89_2000_TO_ETRF89_1992', 'forward')
 ;
 
 
@@ -1341,10 +1341,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_LT', 1, 'NKG', 'P1_2008_LT'),
-    ('NKG', 'ETRF00_TO_LT', 2, 'NKG', 'ETRF2000_2000_TO_ETRF_2000_2003')
+    ('NKG', 'ETRF00_TO_LT', 1, 'NKG', 'P1_2008_LT', 'forward'),
+    ('NKG', 'ETRF00_TO_LT', 2, 'NKG', 'ETRF2000_2000_TO_ETRF_2000_2003', 'forward')
 ;
 
 
@@ -1375,12 +1375,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_LT', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_LT', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_LT', 3, 'NKG', 'P1_2008_LT'),
-    ('NKG', 'ITRF2000_TO_LT', 4, 'NKG', 'ETRF2000_2000_TO_ETRF_2000_2003')
+    ('NKG', 'ITRF2000_TO_LT', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_LT', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_LT', 3, 'NKG', 'P1_2008_LT', 'forward'),
+    ('NKG', 'ITRF2000_TO_LT', 4, 'NKG', 'ETRF2000_2000_TO_ETRF_2000_2003', 'forward')
 ;
 
 
@@ -1448,10 +1448,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_NO', 1, 'NKG', 'P1_2008_NO'),
-    ('NKG', 'ETRF00_TO_NO', 2, 'NKG', 'ETRF93_2000_TO_ETRF93_1995')
+    ('NKG', 'ETRF00_TO_NO', 1, 'NKG', 'P1_2008_NO', 'forward'),
+    ('NKG', 'ETRF00_TO_NO', 2, 'NKG', 'ETRF93_2000_TO_ETRF93_1995', 'forward')
 ;
 
 
@@ -1482,12 +1482,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_NO', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_NO', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_NO', 3, 'NKG', 'P1_2008_NO'),
-    ('NKG', 'ITRF2000_TO_NO', 4, 'NKG', 'ETRF93_2000_TO_ETRF93_1995')
+    ('NKG', 'ITRF2000_TO_NO', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_NO', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_NO', 3, 'NKG', 'P1_2008_NO', 'forward'),
+    ('NKG', 'ITRF2000_TO_NO', 4, 'NKG', 'ETRF93_2000_TO_ETRF93_1995', 'forward')
 ;
 
 
@@ -1555,10 +1555,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF00_TO_SE', 1, 'NKG', 'P1_2008_SE'),
-    ('NKG', 'ETRF00_TO_SE', 2, 'NKG', 'ETRF97_2000_TO_ETRF97_1999')
+    ('NKG', 'ETRF00_TO_SE', 1, 'NKG', 'P1_2008_SE', 'forward'),
+    ('NKG', 'ETRF00_TO_SE', 2, 'NKG', 'ETRF97_2000_TO_ETRF97_1999', 'forward')
 ;
 
 
@@ -1589,12 +1589,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2000_TO_SE', 1, 'EPSG', '7941'), -- ITRF2000 -> ETRF2000
-    ('NKG', 'ITRF2000_TO_SE', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000'),
-    ('NKG', 'ITRF2000_TO_SE', 3, 'NKG', 'P1_2008_SE'),
-    ('NKG', 'ITRF2000_TO_SE', 4, 'NKG', 'ETRF97_2000_TO_ETRF97_1999')
+    ('NKG', 'ITRF2000_TO_SE', 1, 'EPSG', '7941', 'forward'), -- ITRF2000 -> ETRF2000
+    ('NKG', 'ITRF2000_TO_SE', 2, 'NKG', 'NKG_ETRF00_TO_ETRF2000', 'reverse'),
+    ('NKG', 'ITRF2000_TO_SE', 3, 'NKG', 'P1_2008_SE', 'forward'),
+    ('NKG', 'ITRF2000_TO_SE', 4, 'NKG', 'ETRF97_2000_TO_ETRF97_1999', 'forward')
 ;
 
 
@@ -1660,10 +1660,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_DK', 1, 'NKG', 'PAR_2020_DK'),
-    ('NKG', 'ETRF14_TO_DK', 2, 'NKG', 'DK_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_DK', 1, 'NKG', 'PAR_2020_DK', 'forward'),
+    ('NKG', 'ETRF14_TO_DK', 2, 'NKG', 'DK_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -1694,12 +1694,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_DK', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_DK', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_DK', 3, 'NKG', 'PAR_2020_DK'),
-    ('NKG', 'ITRF2014_TO_DK', 4, 'NKG', 'DK_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_DK', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_DK', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_DK', 3, 'NKG', 'PAR_2020_DK', 'forward'),
+    ('NKG', 'ITRF2014_TO_DK', 4, 'NKG', 'DK_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -1774,10 +1774,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_EE', 1, 'NKG', 'PAR_2020_EE'),
-    ('NKG', 'ETRF14_TO_EE', 2, 'NKG', 'EE_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_EE', 1, 'NKG', 'PAR_2020_EE', 'forward'),
+    ('NKG', 'ETRF14_TO_EE', 2, 'NKG', 'EE_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -1808,12 +1808,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_EE', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_EE', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_EE', 3, 'NKG', 'PAR_2020_EE'),
-    ('NKG', 'ITRF2014_TO_EE', 4, 'NKG', 'EE_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_EE', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_EE', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_EE', 3, 'NKG', 'PAR_2020_EE', 'forward'),
+    ('NKG', 'ITRF2014_TO_EE', 4, 'NKG', 'EE_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -1919,12 +1919,12 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_FI', 1, 'NKG', 'PAR_2020_FI'),
-    ('NKG', 'ETRF14_TO_FI', 2, 'NKG', 'FI_2020_INTRAPLATE'),
-    ('NKG', 'ETRF14_TO_FI_EUREF-FIN', 1, 'NKG', 'PAR_2020_FI'),
-    ('NKG', 'ETRF14_TO_FI_EUREF-FIN', 2, 'NKG', 'FI_2020_INTRAPLATE_EUREF-FIN')
+    ('NKG', 'ETRF14_TO_FI', 1, 'NKG', 'PAR_2020_FI', 'forward'),
+    ('NKG', 'ETRF14_TO_FI', 2, 'NKG', 'FI_2020_INTRAPLATE', 'forward'),
+    ('NKG', 'ETRF14_TO_FI_EUREF-FIN', 1, 'NKG', 'PAR_2020_FI', 'forward'),
+    ('NKG', 'ETRF14_TO_FI_EUREF-FIN', 2, 'NKG', 'FI_2020_INTRAPLATE_EUREF-FIN', 'forward')
 ;
 
 
@@ -1973,16 +1973,16 @@ INSERT INTO "concatenated_operation"  VALUES (
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_FI', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_FI', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_FI', 3, 'NKG', 'PAR_2020_FI'),
-    ('NKG', 'ITRF2014_TO_FI', 4, 'NKG', 'FI_2020_INTRAPLATE'),
-    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 3, 'NKG', 'PAR_2020_FI'),
-    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 4, 'NKG', 'FI_2020_INTRAPLATE_EUREF-FIN')
+    ('NKG', 'ITRF2014_TO_FI', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_FI', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_FI', 3, 'NKG', 'PAR_2020_FI', 'forward'),
+    ('NKG', 'ITRF2014_TO_FI', 4, 'NKG', 'FI_2020_INTRAPLATE', 'forward'),
+    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 3, 'NKG', 'PAR_2020_FI', 'forward'),
+    ('NKG', 'ITRF2014_TO_FI_EUREF-FIN', 4, 'NKG', 'FI_2020_INTRAPLATE_EUREF-FIN', 'forward')
 ;
 
 INSERT INTO "usage" VALUES (
@@ -2072,10 +2072,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_LV', 1, 'NKG', 'PAR_2020_LV'),
-    ('NKG', 'ETRF14_TO_LV', 2, 'NKG', 'LV_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_LV', 1, 'NKG', 'PAR_2020_LV', 'forward'),
+    ('NKG', 'ETRF14_TO_LV', 2, 'NKG', 'LV_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -2106,12 +2106,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_LV', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_LV', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_LV', 3, 'NKG', 'PAR_2020_LV'),
-    ('NKG', 'ITRF2014_TO_LV', 4, 'NKG', 'LV_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_LV', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_LV', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_LV', 3, 'NKG', 'PAR_2020_LV', 'forward'),
+    ('NKG', 'ITRF2014_TO_LV', 4, 'NKG', 'LV_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -2188,10 +2188,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_LT', 1, 'NKG', 'PAR_2020_LT'),
-    ('NKG', 'ETRF14_TO_LT', 2, 'NKG', 'LT_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_LT', 1, 'NKG', 'PAR_2020_LT', 'forward'),
+    ('NKG', 'ETRF14_TO_LT', 2, 'NKG', 'LT_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -2222,12 +2222,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_LT', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_LT', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_LT', 3, 'NKG', 'PAR_2020_LT'),
-    ('NKG', 'ITRF2014_TO_LT', 4, 'NKG', 'LT_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_LT', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_LT', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_LT', 3, 'NKG', 'PAR_2020_LT', 'forward'),
+    ('NKG', 'ITRF2014_TO_LT', 4, 'NKG', 'LT_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -2303,10 +2303,10 @@ INSERT INTO "concatenated_operation" VALUES(
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_NO', 1, 'NKG', 'PAR_2020_NO'),
-    ('NKG', 'ETRF14_TO_NO', 2, 'NKG', 'NO_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_NO', 1, 'NKG', 'PAR_2020_NO', 'forward'),
+    ('NKG', 'ETRF14_TO_NO', 2, 'NKG', 'NO_2020_INTRAPLATE', 'forward')
 ;
 
 INSERT INTO "usage" VALUES (
@@ -2334,12 +2334,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_NO', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_NO', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_NO', 3, 'NKG', 'NKG_ETRF14_ETRF93_2000'),
-    ('NKG', 'ITRF2014_TO_NO', 4, 'NKG', 'NO_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_NO', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_NO', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_NO', 3, 'NKG', 'NKG_ETRF14_ETRF93_2000', 'forward'),
+    ('NKG', 'ITRF2014_TO_NO', 4, 'NKG', 'NO_2020_INTRAPLATE', 'forward')
 ;
 
 INSERT INTO "usage" VALUES (
@@ -2414,10 +2414,10 @@ INSERT INTO "concatenated_operation" VALUES(
 
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ETRF14_TO_SE', 1, 'NKG', 'PAR_2020_SE'),
-    ('NKG', 'ETRF14_TO_SE', 2, 'NKG', 'SE_2020_INTRAPLATE')
+    ('NKG', 'ETRF14_TO_SE', 1, 'NKG', 'PAR_2020_SE', 'forward'),
+    ('NKG', 'ETRF14_TO_SE', 2, 'NKG', 'SE_2020_INTRAPLATE', 'forward')
 ;
 
 
@@ -2448,12 +2448,12 @@ INSERT INTO "concatenated_operation"  VALUES (
 );
 
 INSERT INTO "concatenated_operation_step" (
-    operation_auth_name, operation_code, step_number, step_auth_name, step_code
+    operation_auth_name, operation_code, step_number, step_auth_name, step_code, step_direction
 ) VALUES
-    ('NKG', 'ITRF2014_TO_SE', 1, 'EPSG', '8366'), -- ITRF2014 -> ETRF2014
-    ('NKG', 'ITRF2014_TO_SE', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014'),
-    ('NKG', 'ITRF2014_TO_SE', 3, 'NKG', 'PAR_2020_SE'),
-    ('NKG', 'ITRF2014_TO_SE', 4, 'NKG', 'SE_2020_INTRAPLATE')
+    ('NKG', 'ITRF2014_TO_SE', 1, 'EPSG', '8366', 'forward'), -- ITRF2014 -> ETRF2014
+    ('NKG', 'ITRF2014_TO_SE', 2, 'NKG', 'NKG_ETRF14_TO_ETRF2014', 'reverse'),
+    ('NKG', 'ITRF2014_TO_SE', 3, 'NKG', 'PAR_2020_SE', 'forward'),
+    ('NKG', 'ITRF2014_TO_SE', 4, 'NKG', 'SE_2020_INTRAPLATE', 'forward')
 ;