code: def default_provenance():
      
      field = TextParameter()
      field.name = tr('Provenance')
      field.description = tr('The provenance of minimum needs')
      field.value = 'The minimum needs are based on BNPB Perka 7/2008.'
      return field
docs: The provenance for the default values.
  
      :return: default provenance.
      :rtype: str