+// xbt_automaton_propositional_symbol accessors:
+XBT_PUBLIC(xbt_automaton_propositional_symbol_callback_type) xbt_automaton_propositional_symbol_get_callback(xbt_automaton_propositional_symbol_t symbol);
+XBT_PUBLIC(void*) xbt_automaton_propositional_symbol_get_data(xbt_automaton_propositional_symbol_t symbol);
+XBT_PUBLIC(const char*) xbt_automaton_propositional_symbol_get_name(xbt_automaton_propositional_symbol_t symbol);
+
+// xbt_automaton_propositional_symbol methods!
+XBT_PUBLIC(int) xbt_automaton_propositional_symbol_evaluate(xbt_automaton_propositional_symbol_t symbol);
+
+XBT_PUBLIC(xbt_automaton_state_t) xbt_automaton_get_current_state(xbt_automaton_t a);
+
+XBT_PUBLIC(int) xbt_automaton_state_compare(xbt_automaton_state_t s1, xbt_automaton_state_t s2);
+
+XBT_PUBLIC(int) xbt_automaton_propositional_symbols_compare_value(xbt_dynar_t s1, xbt_dynar_t s2);