from sfa.util.faults import SfaInvalidArgument, InvalidRSpec, SfatablesRejected
from sfa.util.sfatime import datetime_to_string
-from sfa.util.xrn import Xrn
+from sfa.util.xrn import Xrn, urn_to_hrn
from sfa.util.method import Method
from sfa.util.sfatablesRuntime import run_sfatables
from sfa.trust.credential import Credential