def SplitFieldName(qualified_field_name):
  """Splits the field name on '/' and returns the parts separately.

  Args:
    qualified_field_name: the possibly fully qualified field name

  Returns:
    tuple with namespace and raw field name.  Defaults to global for no
    namespace.
  """

  field_only = qualified_field_name
  namespace = ''
  split = qualified_field_name.split('/')
  if len(split) == 2:
    namespace = split[0]
    field_only = split[1]
  return namespace, field_only