'Adds an rdf value to the collection.
Adds an rdf value to the collection. Does not require that the collection
be locked.
Args:
rdf_value: The rdf value to add to the collection.
timestamp: The timestamp (in microseconds) to store the rdf value
at. Defaults to the current time.
suffix: A \'fractional timestamp\' suffix to reduce the chance of
collisions. Defaults to a random number.
**kwargs: Keyword arguments to pass through to the underlying database
call.
Returns:
The pair (timestamp, suffix) which identifies the value within the
collection.
Raises:
ValueError: rdf_value has unexpected type.'

def Add(self, rdf_value, timestamp=None, suffix=None, **kwargs):

    return self.StaticAdd(self.collection_id, self.token, rdf_value, timestamp=timestamp, suffix=suffix, **kwargs)
