Value,Description,Reference
labor,"Total staff time to recovery from the activity (e.g.,
        2 employees working 4 hours each would be 8 hours).",[RFC7970]
elapsed,"Elapsed time from the beginning of the recovery to
        its completion (i.e., wall-clock time).",[RFC7970]
downtime,"Duration of time for which some provided service(s)
        was not available.",[RFC7970]
ext-value,"A value used to indicate that this attribute is
        extended and the actual value is provided using the
        corresponding ext-* attribute.  See Section 5.1.1 of [RFC7970].",[RFC7970]