--- a/absyntax/absyntax.def	Fri Feb 17 19:47:23 2012 +0000
+++ b/absyntax/absyntax.def	Fri Feb 17 19:47:58 2012 +0000
@@ -974,21 +974,22 @@
 /*******************/
 /* B 2.2 Operators */
 /*******************/
+/* NOTE: The parameter 'called_fb_declaration'is used to pass data between stage 3 and stage4 (although currently it is not used in stage 4 */
 SYM_REF0(LD_operator_c)
 SYM_REF0(LDN_operator_c)
 SYM_REF0(ST_operator_c)
 SYM_REF0(STN_operator_c)
 SYM_REF0(NOT_operator_c)
-SYM_REF0(S_operator_c)
-SYM_REF0(R_operator_c)
-SYM_REF0(S1_operator_c)
-SYM_REF0(R1_operator_c)
-SYM_REF0(CLK_operator_c)
-SYM_REF0(CU_operator_c)
-SYM_REF0(CD_operator_c)
-SYM_REF0(PV_operator_c)
-SYM_REF0(IN_operator_c)
-SYM_REF0(PT_operator_c)
+SYM_REF0(S_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(R_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(S1_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(R1_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(CLK_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(CU_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(CD_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(PV_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(IN_operator_c, symbol_c *called_fb_declaration;)
+SYM_REF0(PT_operator_c, symbol_c *called_fb_declaration;)
 SYM_REF0(AND_operator_c)
 SYM_REF0(OR_operator_c)
 SYM_REF0(XOR_operator_c)