curent picks the most recent value, whether or not it is available. This is particularly useful for conditions that compare the latest value of an attribute with earlier ones, such as:
some RequestDr is not current RequestDr,
For example, given the following case fragment,
01 Jun 02 30 Jun 03 02 Nov 03 DiabeticStatus F T T
some DiabeticStatus is not current DiabeticStatus