adding comments.
-----------------------------------------------------------
--- a/absyntax/absyntax.def Sat Nov 17 09:44:14 2007 +0100
+++ b/absyntax/absyntax.def Sat Nov 17 10:08:38 2007 +0100
@@ -1,5 +1,5 @@
/*
- * (c) 2003 Mario de Sousa
+ * (c) 2003-2007 Mario de Sousa
*
* Offered to the public under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of the
@@ -555,31 +555,61 @@
/* B.1.6 Sequential function chart elements */
/*********************************************/
+/* | sequential_function_chart sfc_network */
SYM_LIST(sequential_function_chart_c)
+/* initial_step {step | transition | action} */
SYM_LIST(sfc_network_c)
+/* INITIAL_STEP step_name ':' action_association_list END_STEP */
SYM_REF2(initial_step_c, step_name, action_association_list)
+/* | action_association_list action_association ';' */
SYM_LIST(action_association_list_c)
+
+/* STEP step_name ':' action_association_list END_STEP */
SYM_REF2(step_c, step_name, action_association_list)
+
+/* action_name '(' action_qualifier indicator_name_list ')' */
+/* action_qualifier -> may be NULL ! */
SYM_REF3(action_association_c, action_name, action_qualifier, indicator_name_list)
+/* N | R | S | P */
SYM_TOKEN(qualifier_c)
+
+/* L | D | SD | DS | SL */
SYM_TOKEN(timed_qualifier_c)
+/* | indicator_name_list ',' indicator_name */
SYM_LIST(indicator_name_list_c)
+/* qualifier | timed_qualifier ',' action_time */
+/* action_time -> may be NULL ! */
SYM_REF2(action_qualifier_c, action_qualifier, action_time)
+/* TRANSITION [transition_name] ['(' PRIORITY ASSIGN integer ')']
+ * FROM steps TO steps
+ * transition_condition
+ * END_TRANSITION
+*/
+/* transition_name -> may be NULL ! */
+/* integer -> may be NULL ! */
SYM_REF5(transition_c, transition_name, integer, from_steps, to_steps, transition_condition)
+/* ':' eol_list simple_instr_list | ASSIGN expression ';' */
+/* transition_condition_il -> may be NULL ! */
+/* transition_condition_st -> may be NULL ! */
SYM_REF2(transition_condition_c, transition_condition_il, transition_condition_st)
+/* step_name | '(' step_name_list ')' */
+/* step_name -> may be NULL ! */
+/* step_name_list -> may be NULL ! */
SYM_REF2(steps_c, step_name, step_name_list)
+/* | step_name_list ',' step_name */
SYM_LIST(step_name_list_c)
+/* ACTION action_name ':' function_block_body END_ACTION */
SYM_REF2(action_c, action_name, function_block_body)
/********************************/