from sfa.util.sfalogging import logger
from sfa.util.xrn import hrn_to_urn, urn_to_hrn
-from sfa.util.plxrn import PlXrn
from sfa.rspecs.version import RSpecVersion
from sfa.rspecs.elements.element import Element
from sfa.rspecs.elements.versions.pgv2Link import PGv2Link