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from sys import version_info
if version_info[0:2] > (2, 2):
from unicodedata import normalize
else:
normalize = None
from rdflib.Identifier import Identifier
from rdflib.Literal import Literal
class URIRef(Identifier):
def __new__(cls, value):
return Identifier.__new__(cls, value)
def __init__(self, value):
if normalize and value:
if not isinstance(value, unicode):
value = unicode(value)
if value != normalize("NFC", value):
raise Error("value must be in NFC normalized form.")
def n3(self):
return "<%s>" % self
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