-XBT_PUBLIC(xbt_propositional_symbol_t) xbt_new_propositional_symbol(xbt_automaton_t a, char* id, void* fct);
+XBT_PUBLIC(xbt_propositional_symbol_t) xbt_new_propositional_symbol(xbt_automaton_t a, const char* id, void* fct);
+
+XBT_PUBLIC(xbt_state_t) xbt_automaton_get_current_state(xbt_automaton_t a);
+
+XBT_PUBLIC(int) automaton_state_compare(xbt_state_t s1, xbt_state_t s2);
+
+XBT_PUBLIC(int) propositional_symbols_compare_value(xbt_dynar_t s1, xbt_dynar_t s2);
+
+XBT_PUBLIC(int) automaton_transition_compare(const void *t1, const void *t2);
+
+XBT_PUBLIC(int) automaton_label_transition_compare(xbt_exp_label_t l1, xbt_exp_label_t l2);
+