编写XSL公式时需要在for-each条件下存储先前的元素值

Question

在遇到类似情况时需要帮助 范围

R1 for year 2000 ti 2001 is 0 to 10
R2 fir year. 2001 to 2002 is 0 to 10
R3. for year 2002 to 2003 is 0 to 10
R4 fir year.  2003-2004 is 20 to 30

然后它将显示为

Range 2000 to 2003 0 to 10
Range 2003 to 2004  20 to 30

我们将非常感谢您的帮助。