什么是coupon bearing bond

问题如下：

Explain how discount factors are calculated from coupon-bearing bond prices.

选项：

解释：

We work from the shortest maturity bond to the longest maturity bond calculating discount factors. A bond maturing at time T can be used to calculate the discount factor for that maturity because the discount factors relevant to valuing its coupons have already been calculated.

题目问：如何通过附息债券的价格来计算discount factor？

coupon*discount factor+face value*discount factor=price