I copy here a comment originaly made on bug 9351 For some libraries, what is needed in statistical table is BOTH items.itype and biblioitems.itemtype, and maybe a clear indication (a 3rd column "circulation_type" ?) of which type is was used for circulation rights. Ex: In Rennes 2 we use item level for defining circulation rules. items.itype are codes for "Short Loan", "Normal Loan", "Long loan". biblioitems.itemtype are "Book", "Serial", "DVD" etc. For our annual report, we need to know the number of Books, Serials, DVD checked out, even if the type used for defining circulation rules are "Short loan", and not "Book". But other libraries may have different settings, and may have need to make stats on item level, or maybe cross stats on both level.