diff --git a/api/s12_curves.py b/api/s12_curves.py
index e2af652..89235cd 100644
--- a/api/s12_curves.py
+++ b/api/s12_curves.py
@@ -134,7 +134,7 @@ def inp_in_curve(section: list[str]) -> ChangeSet:
     count = len(section)
     for i in range(0, count):
         if section[i].startswith(';'):
-            # this is description
+            # ;type: desc
             type_plus_desc = section[i].removeprefix(';')
             type_plus_desc_tokens = type_plus_desc.split(':')
             next = i + 1
@@ -182,21 +182,11 @@ def inp_out_curve(name: str) -> list[str]:
 #--------------------------------------------------------------
 def inp_in_curve_v3(section: list[str]) -> ChangeSet:
     types = {}
-    descs = {}
     curves: dict[str, list[dict[str, float]]] = {}
 
     count = len(section)
     for i in range(0, count):
         if section[i].startswith(';'):
-            # this is description
-            type_plus_desc = section[i].removeprefix(';')
-            type_plus_desc_tokens = type_plus_desc.split(':')
-            next = i + 1
-            if next < count and section[next].startswith(';') == False:
-                next_tokens = section[next].split()
-                types[next_tokens[0]] = type_plus_desc_tokens[0].strip().upper()
-                if len(type_plus_desc_tokens) > 1:
-                    descs[next_tokens[0]] = type_plus_desc_tokens[1].strip()
             continue
 
         tokens = section[i].split()
@@ -220,4 +210,16 @@ def inp_in_curve_v3(section: list[str]) -> ChangeSet:
 
 
 def inp_out_curve_v3(name: str) -> list[str]:
-    return []
+    lines = []
+    types = read_all(name, f"select * from _curve")
+    for type in types:
+        id = type['id']
+        # id type
+        lines.append(f"{id} {type['type']}")
+        objs = read_all(name, f"select * from curves where id = '{id}' order by _order")
+        for obj in objs:
+            id = obj['id']
+            x = obj['x']
+            y = obj['y']
+            lines.append(f'{id} {x} {y}')
+    return lines