对于同一作者同一书名的书，存储书名、书目编号、作者名、库存册数（不包括已借出的）、已借出册数。对于每一本书还要存储一个登录号（这里区别每一本书的唯一标志）、从当前借阅该书的读者姓名与借书证号、借阅日期。-A book by the same author' s book store title, catalog number, author name, stock number of copies (not including the loan), has lent a number of copies. For each book also store a log number (here the only sign of the difference between each book), to borrow from the current book readers name and library card number, borrow date.