How do we test whether a date is within 180 days from today in xslt in datapower

Question

I am writing an xslt for datapower and in that I am getting a date(Payment Date).I have to check whether that date(Paymentt Date) is within 180 days of current date

Answer 1

Calculating date difference in XSLT 1.0:

When applied to the following input XML:

    2013-09-15

The result will be:

  179

if the transformation is performed today, 2014-03-13.