Reference Record

ReferenceRecord

ReferenceRecord(*args)

Set of snaks representing provenance information.

ReferenceRecordSet

ReferenceRecordSet(*args)	Set of reference records.
ReferenceRecordSet.args_set	Set arguments as frozen set.
ReferenceRecordSet.get_args_set()	Gets set arguments as frozen set.
ReferenceRecordSet.union(*others)	Computes the union of set and others.