-guint transaction_tags_count(Transaction *ope);
-void transaction_tags_clone(Transaction *src_txn, Transaction *dst_txn);
-guint transaction_tags_parse(Transaction *ope, const gchar *tagstring);
-gchar *transaction_tags_tostring(Transaction *ope);
-gint transaction_auto_assign(GList *ope_list, guint32 key);