old_contents: from uuid import uuid4
  
  from rdflib import URIRef, Namespace
  
  PRED = Namespace('/data/fields/')
  META = Namespace('/meta/')
  ID = Namespace('/data/id/')
  
  
  def BNode():
      return URIRef(uuid4().urn)
  
new_contents: from uuid import uuid4
  
  from rdflib import URIRef, Namespace
  
  PRED = Namespace('urn:fields:')
  META = Namespace('urn:meta:')
  ID = Namespace('urn:id:')
  
  
  def BNode():
      return URIRef(uuid4().urn)
  
subject: Rename vocabs.