diff --git a/sql/MyFirstUDRKit.ddl b/sql/MyFirstUDRKit.ddl
index dba3aa8..022f973 100644
--- a/sql/MyFirstUDRKit.ddl
+++ b/sql/MyFirstUDRKit.ddl
@@ -14,14 +14,24 @@ create or alter function flagged (
   flags integer, flag integer
   )
 returns integer
-external name 'MyFirstUDRKit!MFK_flagged!How is this function used?' engine udr;
+external name 'MyFirstUDRKit!MFK_flagged!Check if flag is set in flags. flag is zero-based.' engine udr;
 grant execute on function flagged to public;
 
 
--- create or alter function LoadBlobFromFile (
--- 	afilename varchar(8191),
--- 	ablob BLOB
--- 	) returns bigint
--- 	external name 'MyFirstUDRKit!MFK_Load_Blob_From_File!Load file and save to Blob'
--- 	engine udr;
--- grant execute on function LoadBlobFromFile to public;
+create or alter function LoadBlobFromFile (
+	afilename varchar(8191),
+	ablob BLOB
+	) returns bigint
+	external name 'MyFirstUDRKit!MFK_LoadBlobFromFile!Load file and save to Blob'
+	engine udr;
+grant execute on function LoadBlobFromFile to public;
+
+
+create or alter function SaveBlobToFile (
+	afilename varchar(8191),
+	ablob BLOB
+) returns bigint
+external name 'MyFirstUDRKit!MFK_SaveBlobToFile!Save blob to file'
+engine udr;
+grant execute on function SaveBlobToFile to public;
+