--- a/lib/ramp_st.txt	Mon Apr 04 18:54:55 2011 +0200
+++ b/lib/ramp_st.txt	Mon Apr 04 19:18:22 2011 +0200
@@ -1,3 +1,13 @@
+(* Following taken directly from the IEC 61131.3 draft standard *)
+
+(*
+ * An IEC 61131-3 IL and ST compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ *)
+
  FUNCTION_BLOCK RAMP
    VAR_INPUT
      RUN : BOOL ;      (* 0 - track X0, 1 - ramp to/track X1 *)